因式分解(3x-y)² -(2x+y)² -(y+3x)(3x-y)
化简:1.2x²-y²+(2y²-3x²)-(2y²+x²)
因式分解: 16(x-y)²-9(x+y)²
(3x-2y)²(3x-2y)²(9x²+4y²)²
(x²+4y²)²-16x²y² 因式分解
求一道计算题,{(2\3x²)-(2\x²+y²)*[(x²+y²\3
因式分解 x²-3xy+2y²+x-2
数学因式分解计算题[(-x+y)/ (x²-y²)] - [(-x-y)/ (x+y)²]
(x+y)²-2(x²-y²)+(y-x)²
因式分解(x-y)²+6(x-y)+9
再求代数式(4x²-7x+6y-1)-(-2x²+3y²+2y+2x)+(-6x²
已知(x+2)²+|x+y+5|=0,求3x²y+{-2x²y-[-2xy+(x²
分解公因式2题(x-2y+3y)²(-x+y)(-y-x)(-2x²+1/2)(-2x²-