因式分解.(1)6a²b³(x-y)-9a³b²(x-y)³ (2)x的8次方-1

问题描述:

因式分解.(1)6a²b³(x-y)-9a³b²(x-y)³ (2)x的8次方-1
(3)2x²-7xy+6y²

(1)6a²b³(x-y)-9a³b²(x-y)³=3a²b²(x-y)[2b-3a(x-y)²]=3a²b²(x-y)(2b-3ax²+6axy-3ay²)(2)x的8次方-1 =(x^4+1)(x^4-1)=(x^4+1)(x²+1)(x...还有一道x^4+2x²-8 一道2x²-7xy+6y²x^4+2x²-8=(x²+4)(x²-2) 2x²-7xy+6y²=(2x-3y)(x-2y)