求解~ ~ ~ (3x+2y)²-(2x-3y)²
(3x-y)²-2x(4x-5y)-(x+2y)²
先化简再求值:(x-2y)²-(x+2y)(x-2y)-(x-3y)(x-y).其中x²+9y
先化简,在求值:(x-y)²+(3x-2y)(2x+y)-x(6x-y)
3(x-2y)²+(x-2y)因式分解
[(3x-2y)²-(3x+2y)(3x-2y)]/(2y-3y)
3m(x-y)-2(y-x)²因式分解
数学十字相乘法(分解因式)两道题求解 x²-xy-2y²-3x+3y+2 3x²-7xy-
2x²-3xy=y²=0(x,y不得o)求x/y+y/x
(X-Y)3-4(X-Y)2+4(X-Y)因式分解大神求解
(3x-2y)²+(3x-2y)(-2y-3x)
(2x-3y)²-(3x-2y)(x+y)
求解二元一次方程组,3x-4(x-y)=2 ① 2x-3y=7②; 2(x+y)-(x-y)=3① (x+y)-2(x-