2xy-xz6x^2+9x4x^2-9x^2-4x+4x^2-16y^29x^2-6x+12x^2y-8xy+8y3x(a-b)-2y(b-a)a^2(y-3)+(3-y)x^2(x-y)-(x-y)4xy-4x^2y-y(3a+2)^2-(a-6)^2x^4-8x^2+16我已经提高悬赏分
问题描述:
2xy-xz
6x^2+9x
4x^2-9
x^2-4x+4
x^2-16y^2
9x^2-6x+1
2x^2y-8xy+8y
3x(a-b)-2y(b-a)
a^2(y-3)+(3-y)
x^2(x-y)-(x-y)
4xy-4x^2y-y
(3a+2)^2-(a-6)^2
x^4-8x^2+16
我已经提高悬赏分
答
分太少题太多而且太简单
答
x(2y-z)
3x(2x + 3)
4(x-3/2)(x+3/2)
(x - 2)^2
(x -4y)(x+4y)
(3x -1)^2
2y(x -2)^2
(a-b)(3x+2y)
(y-3)(a-1)(a+1)
(x-y)(x-1)(x+1)
-y(2x-1)^2
先用平方差公式得:(3a+2+a-6)[(3a+2)-(a-6)],整理得,8(a-1)(a+4)
(x^2-4)^2=(x+2)^2*(x-2)^2