find the mistakeb^-n=-1/b^n^n is squared/ is a fraction

Intermediate Algebra
19th Edition
ISBN:9780998625720
Author:Lynn Marecek
Publisher:Lynn Marecek
Chapter5: Polynomials And Polynomial Functions
Section5.1: Add And Subtract Polynomials
Problem 5.14TI: Find the sum: (2x23xy2y2)+(5x23xy) .
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find the mistake
b^-n=-1/b^n

^n is squared
/ is a fraction

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