(y²+2y)²+2(y²+2y)+1过程啊啊跪求!
三道数学题啊啊啊啊1:已知代数式9-6y-4y²=7,求2y+3y+7的值2:已知多项式-1/5x^2y^m+
用因式分解法解方程:(y-1)²+2y(1-y)=0求过程
若|x+2y-1|+y²+4y+4=0,求(2x-y)²-2(2x-y)(x+2y)+(x+2y)&
(2X-Y)²-1(X-2Y)(X+2Y)=? 因式分解 过程
4x²-3y(4x-3y) 2(x²-y²)+y-x 跪求,因式分解,详细点,要过程
x/x-1=y²+4y-2/y²+4y-1则y²+4y+x等于多少.求详细的解答过程,要快
先化简,在求值:6y-(y+2分之y + 2-y分之y)除以y³-4y-2y²+8分之y,其中y=
求积分∫(1-2y)dy/y²
【(X²+Y²)-(X-Y)²+2Y(X-Y)】/4Y=1,求4X/4X²-Y&
已知{(x²+y²)-(x-y)²+2y(x-y)}÷4y=1,求4x²-y
已知x²+y²+5=2x+4y,求【2x²-(x-y)(x-y)】【(x+y-1)(x-y
若|x+y-1|+(x-y-2)²=0,求代数式(x+2y)(x-2y)-(2x-y)(-y-2x)的值.