(3x)²-(2x+1)(3x-2)=3(x+2)(x-2)
问题描述:
(3x)²-(2x+1)(3x-2)=3(x+2)(x-2)
答
(3x)²-(2x+1)(3x-2)=3(x+2)(x-2)
9x²-(6x²-4x+3x-2)=3(x²-4)
9x²-6x²+x+2=3x²-12
x=-2-12
x=-14