1.(2a+b²)-4a²

问题描述:

1.(2a+b²)-4a²
2.x4(4次方)-3x-4

1.(2a+b²)-4a²
无法分解
2.x4(4次方)-3x-4
=x4-1-3x-3
=(x²+1)(x²-1)-3(x+1)
=(x²+1)(x+1)(x-1)-3(x+1)
=(x+1)[(x²+1)(x-1)-3]
=(x+1)(x³-x²+x-4)