4-12(x-y)+9(x-y)² (x+y)²-4(x+y-1) 4xy²-4x
来源:学生作业帮 编辑:神马作文网作业帮 分类:数学作业 时间:2024/11/13 00:06:55
4-12(x-y)+9(x-y)² (x+y)²-4(x+y-1) 4xy²-4x²y-y³ -a+2a²-a³
x四次方+25x²y²+10x³y
x四次方+25x²y²+10x³y
(1)4-12(x-y)+9(x-y)²
=(【3(x-y)-2】^2)
=((3x-3y-2)^2)
(2)(x+y)²-4(x+y-1)
= (x+y)²-4(x+y)+4
=(【(x+y)-2】^2)
=((x+y-2)^2)
(3) 4xy²-4x²y-y³
=-y(-4xy+4x²+y² )
=-y((2x-y)^2)
(4)-a+2a²-a³
=-a(1-2a+a²)
=-a((a-1)^2)
(5)(x^4)+25x²y²+10x³y
=x²(x²+25y²+10xy)
=x²((x+5y)^2)
=(【3(x-y)-2】^2)
=((3x-3y-2)^2)
(2)(x+y)²-4(x+y-1)
= (x+y)²-4(x+y)+4
=(【(x+y)-2】^2)
=((x+y-2)^2)
(3) 4xy²-4x²y-y³
=-y(-4xy+4x²+y² )
=-y((2x-y)^2)
(4)-a+2a²-a³
=-a(1-2a+a²)
=-a((a-1)^2)
(5)(x^4)+25x²y²+10x³y
=x²(x²+25y²+10xy)
=x²((x+5y)^2)
x²+xy/(x-4y)(x+y),其中x=4,y=-1
4/X+1/Y=2,XY=-1,求代数式4Y-X/X-2Y/(x+2y-12Y²/x-2y)的值
已知x/y=2,求2x(x+y)-y(x+y)/4x²-4xy+y²
多项式因式分解 1,(x-y)³-(x-y)²(x+y) 2,x(x²-xy)-(4x
已知x²+y²-8x+6y+25=0,求(x-y+4xy/x-y)(x+y-4xy/x+y)
(-x-2y)(x²-2xy+4y²)
化简(x²y-4y²)/(x²+4xy+4y²)*[(4xy)/(x-2y)+x
已知非零有理数x,y满足x²-4xy+4y²=0,求x-y/x+y-y-x/x+y的值.
(2x-y)²-4(x-y)(x+2y)
化简:(2x-y)²-4(x-y)(x+y)
(x-6y)/(x²-4y²)+(2y)/(x²-2xy)
解方程x²-2xy+y²=9,x²+4xy+4y²+x+2y=2 2x-1/y=