Question

Find the value of (a – b) (a + b) + (b – a)(b +a )




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Answer 1

Answer:

=a(a+b)-b(a+b)+b(b-a)-a(b+a)

=a²+ab-ba+b²+b²-ba-ab+a²

=a⁴+b⁴-2(ba)

=(a+b)²

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