Rules of Roots Combined Practice Problems & Exercises

Master combining powers and roots with step-by-step practice problems. Learn the 5 essential properties of radicals through interactive exercises and solutions.

📚Practice Combining Powers and Roots
  • Apply the five fundamental properties of roots and radicals
  • Convert between radical notation and exponential form using fractional exponents
  • Simplify products and quotients of square roots and higher-order radicals
  • Solve nested root expressions using the root of a root property
  • Combine multiple operations involving powers, roots, and basic arithmetic
  • Master the order of operations when working with radicals and exponents

Understanding Rules of Roots Combined

Complete explanation with examples

Understanding the combination of powers and roots is important and necessary.

First property:
a=a12\sqrt a=a^{ 1 \over 2}
Second property:
amn=amn\sqrt[n]{a^m}=a^{\frac{m}{n}}
Third property:
(a×b)=a×b\sqrt{(a\times b)}=\sqrt{a}\times \sqrt{b}

Fourth property:
ab=ab\sqrt{\frac{a}{b}}=\frac{\sqrt{a}}{\sqrt{b}}

Fifth property:  
amn=an×m\sqrt[n]{\sqrt[m]{a}}=\sqrt[n\times m]{a}

Detailed explanation

Practice Rules of Roots Combined

Test your knowledge with 68 quizzes

Reduce the following equation:

\( a^2\times a^5\times a^3= \)

Examples with solutions for Rules of Roots Combined

Step-by-step solutions included
Exercise #1

1120=? 112^0=\text{?}

Step-by-Step Solution

We use the zero exponent rule.

X0=1 X^0=1 We obtain

1120=1 112^0=1 Therefore, the correct answer is option C.

Answer:

1

Video Solution
Exercise #2

Solve the following problem:

(34)×(32)= \left(3^4\right)\times\left(3^2\right)=

Step-by-Step Solution

In order to solve this problem, we'll follow these steps:

  • Step 1: Identify the base and exponents

  • Step 2: Use the formula for multiplying powers with the same base

  • Step 3: Simplify the expression by applying the relevant exponent rule

Now, let's work through each step:

Step 1: The given expression is (34)×(32) (3^4) \times (3^2) . Here, the base is 3, and the exponents are 4 and 2.

Step 2: Apply the exponent rule, which states that when multiplying powers with the same base, we add the exponents:
am×an=am+n a^m \times a^n = a^{m+n}

Step 3: Using the rule identified in Step 2, we add the exponents 4 and 2:
34×32=34+2=36 3^4 \times 3^2 = 3^{4+2} = 3^6

Therefore, the simplified form of the expression is 36 3^6 .

Answer:

36 3^6

Video Solution
Exercise #3

Reduce the following equation:

(32)4×(53)5= \left(3^2\right)^4\times\left(5^3\right)^5=

Step-by-Step Solution

To solve this problem, we'll employ the power of a power rule in exponents, which states that (am)n=am×n(a^m)^n = a^{m \times n}.

Let's apply this rule to each part of the expression:

  • Step 1: Simplify (32)4(3^2)^4
    According to the power of a power rule, this becomes 32×4=383^{2 \times 4} = 3^8.

  • Step 2: Simplify (53)5(5^3)^5
    Similarly, apply the rule here to get 53×5=5155^{3 \times 5} = 5^{15}.

After simplifying both parts, we multiply the results:

38×5153^8 \times 5^{15}

Thus, the reduced expression is 38×515\boxed{3^8 \times 5^{15}}.

Answer:

38×515 3^8\times5^{15}

Video Solution
Exercise #4

Simplify the following equation:

42×35×43×32= 4^2\times3^5\times4^3\times3^2=

Step-by-Step Solution

To simplify the given expression 42×35×43×32 4^2 \times 3^5 \times 4^3 \times 3^2 , we will follow these steps:

  • Step 1: Identify and group similar bases.

  • Step 2: Apply the rule for multiplying like bases.

  • Step 3: Simplify the expression.

Now, let's go through each step thoroughly:

Step 1: Identify and group similar bases:
We see two distinct bases here: 4 and 3.

Step 2: Apply the rule for multiplying like bases:
For base 4: Combine 424^2 and 434^3, using the rule am×an=am+na^m \times a^n = a^{m+n}.

Add the exponents for base 4: 2+3=5 2 + 3 = 5 , thus, 42×43=45 4^2 \times 4^3 = 4^5 .

For base 3: Combine 353^5 and 323^2, still using the same exponent rule.

Add the exponents for base 3: 5+2=7 5 + 2 = 7 , resulting in 35×32=37 3^5 \times 3^2 = 3^7 .

Step 3: Simplify the expression:
The simplified expression is 45×37 4^5 \times 3^7 .

Therefore, the final simplified expression is 45×37 4^5 \times 3^7 .

Answer:

45×37 4^5\times3^7

Video Solution
Exercise #5

Simplify the following equation:

47×53×42×54= 4^7\times5^3\times4^2\times5^4=

Step-by-Step Solution

To solve this problem, we'll follow these steps:

  • Step 1: Identify and group the terms with the same base.

  • Step 2: Apply the laws of exponents to simplify by adding the exponents of each base.

  • Step 3: Write the simplified form.

Let's work through each step:

Step 1: We are given that 47×53×42×54 4^7 \times 5^3 \times 4^2 \times 5^4 .

Step 2: First, group the terms with the same base:

47×42 4^7 \times 4^2 and 53×54 5^3 \times 5^4 .

Step 3: Use the law of exponents, which states am×an=am+n a^m \times a^n = a^{m+n} .

For the base 4: 47×42=47+2=49 4^7 \times 4^2 = 4^{7+2} = 4^9 .

For the base 5: 53×54=53+4=57 5^3 \times 5^4 = 5^{3+4} = 5^7 .

Therefore, the simplified form of the expression is 49×57 4^9 \times 5^7 .

Answer:

49×57 4^9\times5^7

Video Solution

Frequently Asked Questions

What are the 5 basic rules for combining roots and powers?

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The five essential rules are: 1) √a = a^(1/2), 2) ∜[n]{a^m} = a^(m/n), 3) √(a×b) = √a × √b, 4) √(a/b) = √a / √b, and 5) ∜[n]{∜[m]{a}} = ∜[n×m]{a}. These properties allow you to convert between radical and exponential notation and simplify complex expressions.

How do you convert square roots to exponential form?

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To convert square roots to exponential form, use the rule √a = a^(1/2). For higher-order roots, use ∜[n]{a^m} = a^(m/n) where n is the index and m is the power of the radicand.

When can you multiply square roots together?

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You can multiply square roots with the same index using the property √a × √b = √(a×b). This works for any order of roots as long as they have the same index, such as ∜[3]{x} × ∜[3]{y} = ∜[3]{xy}.

What is the correct order of operations with roots and powers?

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Follow this hierarchy: 1) Grouping symbols (parentheses, brackets), 2) Powers and roots (solved left to right when at same level), 3) Multiplication and division, 4) Addition and subtraction. Always solve operations inside radicals first before taking the root.

How do you simplify nested radicals like √(√a)?

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Use the root of a root property: ∜[n]{∜[m]{a}} = ∜[n×m]{a}. For example, √(∜[3]{8}) = ∜[2×3]{8} = ∜[6]{8}. Multiply the indices together to create a single radical expression.

Can you divide square roots the same way you multiply them?

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Yes, you can divide roots with the same index using √(a/b) = √a / √b. This property works in both directions, so you can either separate a quotient under one radical or combine separate radicals into one quotient.

What common mistakes should I avoid when combining roots and powers?

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Common mistakes include: forgetting that √(a+b) ≠ √a + √b, mixing up the order of operations, incorrectly applying properties to roots with different indices, and not simplifying expressions completely. Always check if roots can be simplified before applying other operations.

How do you solve expressions with both positive and negative roots?

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When dealing with even roots (like square roots), remember that √a² = |a| (absolute value). For odd roots like cube roots, ∜[3]{a³} = a without absolute value signs. Always consider the domain restrictions when working with real numbers.

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