2x的平方y的平方-5xy+3 (a²-7)(a²-6)-90 (2x²-5x)²-(2x²-5x)-6

2x的平方y的平方-5xy+3 (a²-7)(a²-6)-90 (2x²-5x)²-(2x²-5x)-6
2x的平方y的平方-5xy+3 (a²-7)(a²-6)-90 (2x²-5x)²-(2x²-5x)-6

2x的平方y的平方-5xy+3 (a²-7)(a²-6)-90 (2x²-5x)²-(2x²-5x)-6
2x的平方y的平方-5xy+3=(2xy-3)(xy-1)
(a²-7)(a²-6)-90=a^4-13a²+42-90=a^4-13a²-48=(a²-16)(a²+3)=(a+4)(a-4)(a²+3)
(2x²-5x)²-(2x²-5x)-6=(2x²-5x-3)(2x²-5x+2)=(2x+1)(x-3)(2x-1)(x-2)

2x^2y^2-5xy+3
=(2xy-3)(xy-1)
(a²-7)(a²-6)-90
=a^4-13a^2+42-90
=a^4-13a^2-48
=(a^2-16)(a^2+3)
=(a+4)(a-4)(a^2+3)
(2x²-5x)²-(2x²-5x)-6
= (2x²-5x-3)(2x²-5x+2)
=(2x+1)(x-3)(2x-1)(x-2)