4+12(x-y)+9(x-y)^2等于多少
4+12(x-y)+9(x-y)^2等于多少
4+12(x-y)+9(x-y)^2等于多少?
4+12(x-y)+9 (x-y)²等于多少
(x^2-y^2)2除以(x+y)^2再除以(x-y)等于多少
x/4+2等于x,x=多少.y/5等于y-3,Y=多少
[(x^2+y^2)^2-4x^2y^2]/(x^2-y^2)等于多少?
(2x-y)(2x+y)(4x的2次方减y的2次方)等于多少
若x^2-y^2=4,则(x-y)^2乘以(x+y)^2等于多少
已知x+3y=12,则(x平方+2xy - 3y平方)除以(x-y)等于多少
(x-y)²(y-x)³等于多少.
(x-y+z)(x+y+z)等于多少.
(x-y)²×(y-x)³ 等于多少 解法.