-(-3x+5y)²+(3x+5y)²
(3x-y)²-2x(4x-5y)-(x+2y)²
(3x+5y)²-(5x-3y)²
合并同类项:-6x²y-x+5x²y-2x+x³y+3x
因式分解:x²-y²-3x-5y-4
四分之一(x+y)²-3(x-y)³+二分之一(x+y)²-5(x-y)³
合并多项式:5(x-y)²-(x-y)-8(x-y)²-3(x-y)
5(x+y)²-3(x+y)³+(y+x)²-8(y+x)³ 怎么样求解这样的多
x²(3x+5Y)²-y²(5x+3y)² 因式分解 感激不尽!
x+y=3,x²+y²=5,求(x-y)^2014
5x[x-3y]²+2y[3y-x]³因式分解,
|x+y+2|+(2x+3y+5)²=0 求x y的值.
4x+5y=105,2x+3y=178,x,y等于