计算4x(x-1)^2+x(2x+5)(5-2x),
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计算4x(x-1)^2+x(2x+5)(5-2x),计算4x(x-1)^2+x(2x+5)(5-2x),计算4x(x-1)^2+x(2x+5)(5-2x),4x(x-1)^2+x(2x+5)(5-2x
计算4x(x-1)^2+x(2x+5)(5-2x),
计算4x(x-1)^2+x(2x+5)(5-2x),
计算4x(x-1)^2+x(2x+5)(5-2x),
4x(x-1)^2+x(2x+5)(5-2x)
=4x(x^2-2x+1)-x(4x^2-25)
=x(4x^2-8x+4-4x^2+25)
=x(-8x+29)
=x(29-8x)
4x(x^2-2x+1)+x(25-4x^2)
= - 8x^2+4x+25x
=- 8x^2+29x
4x(x^2-2x+1)+x(25-4x^2)
=4x^3-8x^2+4x+25x-4x^3
=-8x^2+29x
4x(x-1)^2+x(2x+5)(5-2x)
=4x(x^2-2x+1)+x(25-4x^2)
=4x^3-8x^2+4x+25x-4x^3
=-8x^2+29x
完
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