Answer
$x^5 \cdot x^5 \cdot x^5 \cdot x^5= x^{5+5+5+5} = x^{5\cdot4} =x^{20}$
Work Step by Step
$a^m \cdot a^n = a^{m+n}$
Use the rule above to obtain:
$(x^5)^4=x^5 \cdot x^5 \cdot x^5 \cdot x^5= x^{5+5+5+5} = x^{5\cdot4} =x^{20}$
Algebra 1
by Hall, Prentice
Published by
Prentice Hall
ISBN 10:
0133500403
ISBN 13:
978-0-13350-040-0
Chapter 7 - Exponents and Exponential Functions - Concept Byte - Powers of Powers and Powers of Products - Page 432: 6
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