-2X的3次方 18X,因式分解
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6xy³-9x²y²-y^4=-y²(-6xy+9x²+y²)=-y²[(3x)²+2×3x×(-y)+(-y)&sup
原式=xy(4x²+4xy+y²)=xy(2x+y)²
(x-y)²+3(y-x)=(x-y)²-3(x-y)=(x-y)[(x-y)-3]=(x-y)(x-y-3)
x^4+x^3-2=x^4-x^3+2x^3-2=x^3(x-1)+2(x^3-1)=x^3(x-1)+2(x-1)(x^2+x+1)=(x-1)[x^3+2(x^2+x+1)]=(x-1)(x^3+
请问是3x^4-243吗?若是则如下:解原式=3(x^4-81)=3(x^2+9)(x^2-9)=3(x^2+9)(x+3)(x-3)
x^3-3x+2=x^3-3x+3-1=(x^3-1)-3(x-1)=(x-1)(x^2+x+1)-3(x-1)=(X-1)(x^2+x-2)=(x-1)^2(x+2)
x^3-x=x(x^2-1)=x(x+1)(x-1)
x^3-x=x(x^2-1)=x(x+1)(x-1)
X的2次方-Y的2次方-3X+3Y=(x-y)(x+y)-3(x-y)=(x-y)(x+y-3)再问:因式分解 (A+B)的3次方-(A+B)再答:(A+B)的3次方-(A+B)=(A+B)【(A+B
原式=2X^3+8X^2+8X=2X(X^2+4X+4)=2X(X+2)^2完毕.
原式=X(X^4-2X^3+X^2-2X+1)
解1/4x+x³-x²=x(1/4-x+x²)=x(1/2-x)²
1+x的5次方减x的3次方减x的2次方=(x^5-x³)-(x²-1)=x³(x²-1)-(x²-1)=(x³-1)(x²-1)=
x^3-11x^2+6x+144=(x^3+27)-(11x^2-6x-117)=(x+3)(x^2-3x+9)-(11x-39)(x+3)=(x+3)(x^2-3x+9-11x+39)=(x+3)(
x的4次方-16x的2次方=﹙x²﹚²-﹙4x﹚²=﹙ײ+4x﹚﹙x²-4x﹚
(3x+y)²-(x-3y)²=[(3x+y)+(x-3y)]·[(3x+y)-(x-3y)]=(4x-2y)(2x+4y)=4(2x-y)(x+2y)
4x4-4x3+x2=x2(4x2-4x+1)=x2(2x-1)2
3x³-2x²-8x=x﹙3x²-2x-8﹚=x﹙3x+4﹚﹙x-2﹚.
X^3-9x=x(x^2-9)=x(x+3)(x-3)