计算:1、(1+a)(a-1)(a²+1)2、(x+y)(x-y)+(x-y)²-x(x-3y)因式分解:x的次方-x-x²+4x²y-4x²y²(a²-1)²+6(1-a²)+9
问题描述:
计算:1、(1+a)(a-1)(a²+1)2、(x+y)(x-y)+(x-y)²-x(x-3y)
因式分解:
x的次方-x
-x²+4x²y-4x²y²
(a²-1)²+6(1-a²)+9
答
1、(1+a)(a-1)(a²+1)=(a²-1)(a²+1)=a^4-12、(x+y)(x-y)+(x-y)²-x(x-3y)=x²-y²+x²-2xy+y²-x²+3xy=x²+xyx的5次方-x=x(x^4-1)=x(x²+1)(x²-1)=x(...