(-2x)^2(x^2-2分之1x+1) 计算
(-2x)^2(x^2-2分之1x+1) 计算
数学人气:675 ℃时间:2020-04-28 06:43:33
优质解答
=4x^4-2x^3+4x^2(a+2)(-a+3)-2(a+3b)(3a-2b)=-a^2+a+6-6a^2-14ab+12b^2=-5a^2+a-14ab+6+12b^2
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