11点前务必答出!)
问题描述:
11点前务必答出!)
1:4a(x-2)²-2b(2-x)³
2:(2x+3)(x-2y)+(x-2y)(x+1)+(2y-x)
3:m²(a²+b²)-mn(b²+a²)+mp(a²+b²)
4:6p(x-1)²-8p²(1-x)²
5:(a-b)的2n次方-(b-a)2n+1次方
答
1:4a(x-2)²-2b(2-x)³=4a(x-2)²+2b(x-2)³=2(x-2)²[2a+b(x-2)]=2(x-2)²(bx+2a-2b)2:(2x+3)(x-2y)+(x-2y)(x+1)+(2y-x)=(2x+3)(x-2y)+(x-2y)(x+1)-(x-2y)=(x-2y)[(2x+3)+(x+1)-1]=3(x-2y...