Algebra 1

Published by Prentice Hall
ISBN 10: 0133500403
ISBN 13: 978-0-13350-040-0

Chapter 8 - Polynomials and Factoring - 8-7 Factoring Special Cases - Practice and Problem-Solving Exercises - Page 515: 26



Work Step by Step

We use the formula for the difference of squares to apply to this question. The difference of squares formula is: $(a-b) (a+b) = a^{2} - b^{2}$ = $(y)^{2}$ - 121 *** Take the square root of 121 which is 11. Becuase 11 × 11= 121 = $(y)^{2}−11^{2}$ In the given formula let y represents a and 11 represents b. $(y)^{2}−11^{2}$ = (y+11)(y-11)
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