Question

化简求值 (x²+y²)(x²-y²)-(x+y)²(x-y)

Answer 1

(x²+y²)(x²-y²)-(x+y)²(x-y)²

=(x²+y²)(x²-y²)-(x²-y²)²

=(x²-y²)(x²+y²-x²+y²)

=2y²(x²-y²)

=2(1/16)(16-1/16)

=1/8*(16-1/16)

=2-1/96

=191/96