只要懂得平方差公式就不难做啦!a²-b²=(a+b)×(a-b)
(x+y)^2-z^2=(x+y+z)×(x+y-z)
a^2-(b-c)^2=(a+b-c)×(a-b+c)
(x-y)^3-x+y= (x-y)^3-(x-y)=(x-y)×[(x-y)²-1]=(x-y)×(x-y+1)×(x-y-1)
16(x+y)^...
只要懂得平方差公式就不难做啦!a²-b²=(a+b)×(a-b)
(x+y)^2-z^2=(x+y+z)×(x+y-z)
a^2-(b-c)^2=(a+b-c)×(a-b+c)
(x-y)^3-x+y= (x-y)^3-(x-y)=(x-y)×[(x-y)²-1]=(x-y)×(x-y+1)×(x-y-1)
16(x+y)^...