Algebra 2 Common Core

Published by Prentice Hall
ISBN 10: 0133186024
ISBN 13: 978-0-13318-602-4

Chapter 6 - Radical Functions and Rational Exponents - 6-5 Solving Square Root and Other Radical Equations - Practice and Problem-Solving Exercises - Page 397: 79

Answer

$625$

Work Step by Step

In this problem, we can break big numbers down to be able to work with them with more ease. Let us break down the number $125$ to base $5$ raised to the $3rd$ power: $(5^3)((5^3)^{1/3})$ Raising a power to a power means we can multiply the two exponents together, keeping the same base. Let's multiply the exponents together first: $(5^3)(5^{(3)(1/3)})$ Multiply to simplify the exponents: $(5^3)(5^{3/3})$ Reduce the fraction in the exponent by dividing both numerator and denominator by $3$, the greatest common factor: $(5^3)(5^{1})$ When we multiply two exponents with the same base, we just add the two exponents, keeping the base: $5^{3 + 1}$ Add the exponents: $5^{4}$ Evaluate by raising $5$ to the power of $4$: $625$
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