解方程:(2x+3)(x-4)-(x+2)(x-3)=xx+6
问题描述:
解方程:(2x+3)(x-4)-(x+2)(x-3)=xx+6
答
(2x+3)(x-4)-(x+2)(x-3)=x^2+6
(2x^2-5x-12)-(x^2-x-6)=x^2+6
2x^2-5x-12-x^2+x+6=x^2+6
-4x-12=0
4x=-12
x=-3