y(x+y)+(x-y)²-(x+y)(x-y),其中x=-1/3,y=3
1个回答
y(x+y)+(x-y)²-(x+y)(x-y)
=xy+y²+x²-2xy + y² -x²+y²
= 3y²-xy
= 3×3²-(-1/3)×3
= 27 +1 = 28
相关问题
(x-y)(x-2y)+(x-2y)(x-3y)-2(x-3y)(x-4y),其中x=4,y=1.5
(x-y)(x-2y)+(x-2y)(x-3y)-2(x-3y)(x-4y),其中x=4,y=1.5
x²-y²/x²+2xy+y² 减 x+y/x-y ,其中x=1 ,y=-3 【
(x+y)(x-y)+(x-y)平方-(x-y)(3x-y) 其中x=-2 y=3分之一
(1)(x/y-y/x)÷ (x/y+y/x-2)÷ (1+y/x) 其中x=1/2,y=1/3
【x+y】【x-y】+【x-y】²-【x²-3xy】,其中x=2,y=1/2
[(x-y)²+(x+y)(x-y)]÷2 其中x=3,y=1.5
[(3x+4y)]^2-3x(3x+4y)]/(--6y),其中x=1,y=3
化简求值:3(x-y)-1/2(x+y)+3/4(x-y)²+3/2(x+y),其中x+y=2,x+y=-3.
合并同类项!5(x+y)²-3(x+y)³+3(x+y)²-5(x+y)³其中x=-1,y=二分之一