计算:﹙﹣x﹚^4·x^3-x^7-2x^3·(-x)^4 计算:(2x-1)^2-2(x-2)(x+6)
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计算:﹙﹣x﹚^4·x^3-x^7-2x^3·(-x)^4计算:(2x-1)^2-2(x-2)(x+6)计算:﹙﹣x﹚^4·x^3-x^7-2x^3·(-x)^4计算:(2x-1)^2-2(x-2)(
计算:﹙﹣x﹚^4·x^3-x^7-2x^3·(-x)^4 计算:(2x-1)^2-2(x-2)(x+6)
计算:﹙﹣x﹚^4·x^3-x^7-2x^3·(-x)^4 计算:(2x-1)^2-2(x-2)(x+6)
计算:﹙﹣x﹚^4·x^3-x^7-2x^3·(-x)^4 计算:(2x-1)^2-2(x-2)(x+6)
(﹣x)^4·x^3-x^7-2x^3·(-x)^4
=x^4·x^3-x^7-2x^3·x^4
=x^7-x^7-2x^7
=-2x^7
(2x-1)²-2(x-2)(x+6)
=(4x²-4x+1)-2(x²+4x-12)
=4x²-4x+1-2x²-8x+24
=2x²-12x+25
计算:﹙﹣x﹚^4·x^3-x^7-2x^3·(-x)^4 计算:(2x-1)^2-2(x-2)(x+6)
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