(2x2-3xy+4y2)+(x2+2xy-3y2)化简(要有过程)
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(2x2-3xy+4y2)+(x2+2xy-3y2)化简(要有过程)
(2x2-3xy+4y2)+(x2+2xy-3y2)化简(要有过程)
(2x2-3xy+4y2)+(x2+2xy-3y2)化简(要有过程)
原式=(2x²-3xy+4y²)+(x²+2xy-3y²)
=(2x²+x²)+(-3xy+2xy)+(4y²-3y²)
=3x²-xy+y²
是合并同类项.
原式=4-3xy+8y+2x+2xy-6y
=4-xy+2y+2x
=2x²-3xy+4y²+x²+2xy-3y²
=3x²-xy+y²
计算(x+y/x-y + 4xy/y2-x2)(x2-9y2)/(x2+2xy-3y2)
4x2-3y2+2xy-4x2+5x2
4x2-y2/x2-2xy+y2 +(2x-y)/2x2-2xy
2(x-xy)-3(2x2-3xy)2[x2(2x2-xy+y2)]
2x2+xy-3y2+x+4y-1因式分解
解方程组 {3x2-y2=8 {4x2+12xy+9y2=1 {x2+2xy+y2-4=0 x2+xy+y2=4 4x2-9y2=0 x2-2xy+y2-1=0还有{x2+y2=4xy-y2+4=0x2-----x的平方 y2------y的平方 还有{2x-3y=12x2-3xy+y2-4x+3y-3=0
4x2+3xy-2y2因式分解
x2-2xy+y2=4 x2+y2-x-y=6 解不等式x2-2xy+y2=4 x2+y2-x-y=6 解不等式
求证:(x2-xy+y2)3+(x2+xy+y2)3能被2x2+2y2整除
若X2+xy-2y2=0,则(x2+3xy+y2)/x2+y2=?
因式分解:3x2+5xy-2y2+x+9y-4 x2+x-(a2-a) 3x2+4xy-y2 x,y,a后面的2表示平方
因式分解x2+4xy-4y2 x2-2(根号2)x-3
2(x2-xy)-3(2x2-3xy)-2[x2-(2x2-xy+y2)] 化简.
已知x2+4y2+x2y2+1=6xy,则(x4-y4)/(2x2+xy-y2)*(2x-y)/(xy-y2)/(x2+y2/y)2=
(2x2-3xy+4y2)+(x2+2xy-3y2)化简(要有过程)
x2-4y2-3xy+y+x
x3-y3-x2+2xy-y2 因式分解还有:(2) x2+2xy-3y2+3x+y+2(3) 6x2-7x-4(实数范围内)
如果2/x=3/y,那么x2-2xy+3y2/7x2-y2?