解方程:(3x)²-(2x+1)(3x-2)=3(x-2)(x-2)
人气:139 ℃ 时间:2019-12-22 22:19:16
解答
(3x)²-(2x+1)(3x-2)=3(x-2)(x-2)
9x^2-(6x^2-x-2)=3(x^2-4x+4)
9x^2-6x^2+x+2=3x^2-12x+12
3x^2+x+2=3x^2-12x+12
x+2=-12x+12
13x=10
x=1.3
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