解方程:(2x-3)(x+1)+(3-2x)^2-(2x-3(3x+1)=20
问题描述:
解方程:(2x-3)(x+1)+(3-2x)^2-(2x-3(3x+1)=20
答
(2x-3)(x+1)+(3-2x)²-(2x-3)(3x+1)=20
(2x-3)(x+1)+(2x-3)²-(2x-3)(3x+1)=20
提取公因式(2x-3)
(2x-3)[(x+1)+(2x-3)-(3x+1)]=20
(2x-3)(-3)=20
-6x+9=20
x=-11/6
答
(2x-3)(x+1)+(3-2x)^2-(2x-3(3x+1)=20
(2x-3)[(x+1)+(2x-3)-(3x+1)]=20
(2x-3)×﹙-3)=20
-6x+9=20
-6x=11
x=-11/6