Solve: X³⋅X²÷X⁵+X⁴ - Simplifying Complex Exponent Operations

Exponent Laws with Mixed Operations

Solve the following exercise:

X3X2:X5+X4 X^3\cdot X^2:X^5+X^4

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Simplify the following expression
00:05 According to the laws of exponents when multiplying the same base with different exponents
00:08 We keep the same base and add the exponents
00:12 According to the laws of exponents when dividing the same base with different exponents
00:16 We keep the same base and subtract the exponents
00:25 Continue to solve the expression in order to reduce the exponents
00:33 Any number raised to the power of 0 equals 1
00:37 This is the simplified expression and the solution to the question

Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

Solve the following exercise:

X3X2:X5+X4 X^3\cdot X^2:X^5+X^4

2

Step-by-step solution

Write the problem in an organized way using fraction notation for the first term:X3X2X5+X4 \frac{}{}\frac{X^3\cdot X^2}{X^5}+X^4

Let's continue and refer to the first term in the above sum:

X3X2X5 \frac{X^3\cdot X^2}{X^5}

Begin with the numerator, using the law of exponents for multiplying terms with identical bases:

aman=am+n a^m\cdot a^n=a^{m+n}

and we obtain the following:

X3X2X5=X3+2X5=X5X5 \frac{X^3\cdot X^2}{X^5}=\frac{X^{3+2}}{X^5}=\frac{X^5}{X^5}

Now proceed to use the law of exponents for the division between terms with identical bases:

am:an=aman=amn a^m:a^n=\frac{a^m}{a^n}=a^{m-n}

When in the first stage of the above formula we just wrote the same thing in fraction notation instead of using division (:), let's apply the law of exponents to the problem and calculate the result for the first term that we obtained above:

X5X5=X55=X0 \frac{X^5}{X^5}=X^{5-5}=X^0

Proceed to apply the law of exponents:

a0=1 a^0=1

Note that this rule is actually just the understanding that dividing a number by itself will always give the result 1. Let's return to the problem and we obtain the result of the first term in the exercise (meaning - the result of calculating the fraction) is:

X0=1 X^0=1 ,

Let's return to the complete exercise and summarize everything said so far as follows:

X3X2X5+X4=X5X5+X4=X0+X4=1+X4 \frac{X^3\cdot X^2}{X^5}+X^4=\frac{X^5}{X^5}+X^4=X^0+X^4=1+X^4

3

Final Answer

1+X4 1+X^4

Key Points to Remember

Essential concepts to master this topic
  • Rule: Apply multiplication law first: aman=am+n a^m \cdot a^n = a^{m+n}
  • Technique: Convert division to fraction notation: X3X2÷X5=X5X5 X^3 \cdot X^2 ÷ X^5 = \frac{X^5}{X^5}
  • Check: Verify X0=1 X^0 = 1 and add remaining term: 1+X4 1 + X^4

Common Mistakes

Avoid these frequent errors
  • Incorrectly applying order of operations with exponents
    Don't solve X3X2÷X5+X4 X^3 \cdot X^2 ÷ X^5 + X^4 by adding X5+X4 X^5 + X^4 first = wrong grouping! This ignores proper order of operations. Always handle multiplication and division from left to right before addition.

Practice Quiz

Test your knowledge with interactive questions

\( \)

Simplify the following equation:

\( 5^8\times5^3= \)

FAQ

Everything you need to know about this question

Why do we use fraction notation instead of the division symbol?

+

Fraction notation makes it clearer to apply exponent laws! Writing X5X5 \frac{X^5}{X^5} instead of X5÷X5 X^5 ÷ X^5 helps you see that you can use am÷an=amn a^m ÷ a^n = a^{m-n} .

What does X0 X^0 actually mean?

+

Any number (except 0) raised to the power of 0 equals 1. Think of it as dividing a number by itself: X5X5=1 \frac{X^5}{X^5} = 1 , which is the same as X55=X0=1 X^{5-5} = X^0 = 1 .

Do I multiply the X4 X^4 by anything?

+

No! The X4 X^4 is a separate term being added to the result of the division. Only the terms before the + sign are involved in the division operation.

Can I simplify 1+X4 1 + X^4 further?

+

No, this is already in simplest form. You cannot combine a constant (1) with a variable term (X4 X^4 ) unless you know the specific value of X.

What if the exponents were different numbers?

+

The same laws apply! Always use aman=am+n a^m \cdot a^n = a^{m+n} for multiplication and am÷an=amn a^m ÷ a^n = a^{m-n} for division, regardless of what m and n are.

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