(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)

(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