A quarter (-4x squared +2x-8)- (half x- 1) =-x? - 1

Put x= 1/2 in it.

One quarter (-4x squared +2x-8)- (half x- 1) =-5/4.

(2) (the square of 5a-the square of 3b)+(the square of a+the square of b)-(the square of 5a+the square of 3b) =a? +b？

Bring a=- 1 and b= 1 into the value =2.

(3)2(a b square +ab square) -2(a b-65438 square +0)-2ab-2 square = 0.