HELP ПО МАТЕМАТИКЕ 1) (1+x)(1-x)(1+x^2) 2) 5x^2-3(x+1)(x-1) 3) (x^3+8) : (x^2-2x+4) ...

Question

HELP ПО МАТЕМАТИКЕ

1) (1+x)(1-x)(1+x^2)
2) 5x^2-3(x+1)(x-1)
3) (x^3+8) : (x^2-2x+4)
4) (a^3+27b^3) : (a+3b)

Answer 1

1)=(1-х^2)(1+х^2)=1-х^4

2)=5х^2-3х^2+3=2х^2+3

3)=(х+2)(х^2-2х+4):(х^2-2х+4)=х+2

4)=(а+3б)(а^2-3б+9б^2):(а+3б)=
=а^2-3б+9б^2