Simplify the Expression: 3⁵ ÷ 3² Using Exponent Rules

Exponent Division with Same Base

3532= \frac{3^5}{3^2}=

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:05 Let's start by understanding the plan.
00:08 We're using a formula for dividing powers.
00:12 When you divide powers with the same base, A,
00:15 The result is A to the power of, M minus N.
00:19 Now, let's apply this formula to our problem.
00:23 First, match the numbers in our problem to the formula's variables.
00:32 Keep the base the same, and subtract between the exponents.
00:55 Next, let's calculate the difference.
01:01 Great job! That's how we find the solution.

Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

3532= \frac{3^5}{3^2}=

2

Step-by-step solution

Using the quotient rule for exponents: aman=amn \frac{a^m}{a^n} = a^{m-n} .

Here, we have 3532=352 \frac{3^5}{3^2} = 3^{5-2}

Simplifying, we get 33 3^3

3

Final Answer

33 3^3

Key Points to Remember

Essential concepts to master this topic
  • Quotient Rule: When dividing same bases, subtract the exponents
  • Technique: 3532=352=33 \frac{3^5}{3^2} = 3^{5-2} = 3^3
  • Check: Calculate both ways: 2439=27 \frac{243}{9} = 27 and 33=27 3^3 = 27

Common Mistakes

Avoid these frequent errors
  • Adding exponents instead of subtracting
    Don't add the exponents like 3^5 ÷ 3^2 = 3^7 = 2187! Addition is for multiplication, not division. Always subtract exponents when dividing same bases: 5 - 2 = 3.

Practice Quiz

Test your knowledge with interactive questions

\( 112^0=\text{?} \)

FAQ

Everything you need to know about this question

Why do I subtract exponents when dividing?

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Think of it this way: 3532=3×3×3×3×33×3 \frac{3^5}{3^2} = \frac{3 \times 3 \times 3 \times 3 \times 3}{3 \times 3} . The two 3's in the denominator cancel out two 3's in the numerator, leaving three 3's = 33 3^3 .

What if the bottom exponent is bigger than the top?

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You still subtract! For example: 3235=325=33=133 \frac{3^2}{3^5} = 3^{2-5} = 3^{-3} = \frac{1}{3^3} . Negative exponents mean the result goes in the denominator.

Can I use this rule with different bases?

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No! The quotient rule only works when the bases are exactly the same. You can't simplify 2332 \frac{2^3}{3^2} using this rule.

Should I calculate the actual numbers first?

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Using the exponent rule is much faster! 3532 \frac{3^5}{3^2} means calculating 2439=27 \frac{243}{9} = 27 , but 352=33=27 3^{5-2} = 3^3 = 27 gets the same answer with less work.

What if one of the exponents is 1?

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The rule still works perfectly! 5451=541=53 \frac{5^4}{5^1} = 5^{4-1} = 5^3 . Remember that any number to the first power is just itself, so 51=5 5^1 = 5 .

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