问题描述:
计算1.-2ab(3a^2-2ab-4b^2);
2.(x+3)(x-4)-(x-1)^2;
3.x^2(x-y)+(y-x)
4.4(x+1)^2-7(x-1)(x+1)+3(1-X)^2,其中x=-(1/2)
2.(x+3)(x-4)-(x-1)^2;
3.x^2(x-y)+(y-x)
4.4(x+1)^2-7(x-1)(x+1)+3(1-X)^2,其中x=-(1/2)
问题解答:
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