(1) 2x²(x2+2x-3)
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(1) 2x²(x2+2x-3)
(2)-3x(5-2x+x²)
(3)(3x²+2y²)×2xy
(2)-3x(5-2x+x²)
(3)(3x²+2y²)×2xy
1) 2x²(x2+2x-3)=8x立方-6x平方
(2)-3x(5-2x+x²)=-15x+6x平方-3x立方
(3)(3x²+2y²)×2xy=6x立方y+4xy立方
(2)-3x(5-2x+x²)=-15x+6x平方-3x立方
(3)(3x²+2y²)×2xy=6x立方y+4xy立方
(1) 2x²(x2+2x-3)
(-2x2+3x)-[5x-(2x2+1)-x2].
3x2-[7x-(4x-3)-2x2]
多项式x2-3x+2,x2-18x+32,x2+x-6的公因式是( )
(x-6)(x2+x+1)-x(2x+1)(3x-1)
解方程 x(x-6)+2x(x-3)=3(x2-x-1) 解不等式:2x2(x-3)+4(x2-x)≥x(2x2-2x+
分式计算:2x/x2-x-2÷(1-x/x+1)-x2+2x/x2-4
因式分解:1.(x2+x-6)(x2+x-8)-242.(x+1)(x-2)(x-3)(x-6)+203.(x+1)(x
(x2+3x+9)/(x2-27)+(6x)/(9x-x2)-(x-1)/(6+2x)
已知x2+3x+1=0,求(1)x+1/x,(2)x2+1/x2+2x+2/x的值
解方程:2x(x+1)-(3x-2)x+2x2=x2+1
(x+1)2-2(x2-1)+(x-1)² (x2-3x+1)(x2-3x-3)-5 因式分解