Question

If x= a2-1 and y = 1 - b2 , then find x + y and factories the same . simplify the following using identities . step by step . please .
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Answer 1

Answer:

x+y=(a+b)(a-b)

Step-by-step explanation:

x=a²-1, y=1-b²

x+y

=(a²-1)+(1-b²)

=a²-1+1-b²

=a²-b²-1+1

=a²-b²

=(a+b)(a-b)