计算4m²(2x-3y)²-m²(3x-2y)²和x²﹙x-y﹚+y&
化简:1.2x²-y²+(2y²-3x²)-(2y²+x²)
(3x-2y)²(3x-2y)²(9x²+4y²)²
已知方程x²+y²-2(m+3)+2(1-4m²)+(4m²)²+9=
计算:(1).(-2xy²)*(3x²y)²
求一道计算题,{(2\3x²)-(2\x²+y²)*[(x²+y²\3
(x+y)²-2(x²-y²)+(y-x)²
(2mx²-x²+3x+1)-(5x²+4y²+3x)的值与x无关,求2m&su
(2mx²-x²+3x+)-(5x²-4y²+3x)的值与x无关,求2m&sup
若(2mx²-x²+3x+1)-(5x²-4y²+3想)的结果与x无关,求2m&
(x²+4y²)²-16x²y² 因式分解
计算:3(2x²-3xy²)-2(2xy²-3x²y)
化简再求值[(x²+y²)²-4x²y²]÷(x²-y&su