(x+2)(x+3) (x-4)(x+1) (y+4)(y-2) (y-5)(y-3)
问题描述:
(x+2)(x+3) (x-4)(x+1) (y+4)(y-2) (y-5)(y-3)
解方程组:(x+10)(x-8)=x的平方-100
答
(x+2)(x+3)=x²+5x+6
(x-4)(x+1)=x²-3x-4
(y+4)(y-2)=y²+2y-8
(y-5)(y-3)=y²-8y+15
x²+2x-80=x²-100
2x=-20
x=-10