X的平方-Y的平方-6X-9
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a的平方(x-y)+b的平方(y-x)=(x-y)(a²-b²)=(x-y)(a+b)(a-b)(x的平方-2y)的平方-(1-2y)的平方=(x-2y+1-2y)(x-2y-1+
X的平方-6xy+9y的平方=(x-3y)²
x^2+y^2=6y-4x-13x^2+4x+4+y^2-6y+9=0(x+2)^2+(y-3)^2=0x=-2y=3x^2-y^2=(-2)^2-3^2=4-9=-5
约分6x的平方y/2y的平方=3x^2/y
4X的平方+Y的平方-4X-6Y+10=0可化为:(2x-1)²+(y-3)²=0所以:x=1/2y=3后面的式子不是很明白,不知是不是下面这样:2/3*[√(9X+9Y)]^2[
(x+y)^2-6x^2+6y^2+9(x-y)^2=x^2+2xy+y^2-6x^2+6y^2+9x^2-18xy+9y^2=4x^2-16xy+16y^2=4(x^2-4xy+4y^2)=4(x-
2(y-x)²-7(x-y)+6(x-y)-3(y-x)²=-(y-x)²-(x-y)=-(x-y)²-(x-y)=-(x-y)[(x-y)+1]=(y-x)(
25(x+y)的平方-9(x-y)的平方=[5(x+y)+3(x-y)][5(x+y)-3(x-y)]=(8x+2y)(2x+8y)=4(4x+y)(x+4y)
(x平方+y平方)平方-y平方=x平方+6所以(x²+y²)²-(x²+y²)-6=0(x²+y²+2)(x²+y
6(x+y)的三次-24(x+y)=6(x+y)(x+y+2)(x+y-2)(x的平方+y的平方)的平方-4x的平方y的平方=(x^2+y^y+2xy)(x^2+y^y-2xy)=(x+y)^2(x-
(x+y)²-6x(x+y)+9x²=(x+y)²-2×(x+y)×3x+(3x)²运用完全平方公式=[(x+y)-3x]²=(x+y-3x)
3x的平方-xy/9x的平方-6xy+y的平方=x/(3x-y)=(3x²+xy)/(9x²-y²)
[(x²+y²-9)²-4x²y²]/(x²+6x+9-y²)=(x²+2xy+y²-9)(x²-2
(x+y)(x-y)+(x-y)的平方-(6X的平方Y-2XY的平方)/2Y=x²-y²+x²-2xy+y²-3x²+xy=-x²-xy
【2(x-y)²-8(x-y)²(x+y)+6y(x-y)²】÷2(x-y)²=2(x-y)²÷2(x-y)²-8(x-y)²(x
太多了,这么多题目,自己也可以做做.(1)-9ma^3+6ma²-12ma=-3ma(3a²-2a+4),(2)-4x²-12x²y²+8x^3y
(x^2+y^2)^2-4x^2y^2=(x^2+y^2+2xy)(x^2+y^2-2xy)=(x+y)^2*(x-y)^2=(x^2-y^2)^2数学佰亊嗵为你解答,希望我的回答为您带来帮助!
3a(x-y)+9(y-x)=3(x-y)(a-3)x^2+y^2-1-2xy=(x-y)^2-1=(x-y+1)(x-y-1)(x+2)(x+6)+x^2-4=(x+2)(x+6)+(x+2)(x-
x的4次方y的平方-6x的平方y的平方+9y的平方=y²(x^4-6x^2+9)=y²(x²-3)²=y²(x+√3)²(x-√3)
(x+y)的平方-6x的平方+6y的平方+9(x-y)的平方=(x+y)²-6(x²-y²)+9(x-y)²=(x+y)²-6(x+y)(x-y)+9