Question

Zapisz w postaci sumy algebraicznej:
a) (x+2)(x^2-2x+4)=
b) (x-1)(x^2+x+1)=
c) (x^2-x+1)(1+x)=

Answer 1

a) x^3- 2x^2 + 4x + 2x^2 -2x^2 + 6 = x^3+ 4x+ 6

b) x^3+ x^2 + x -x^2 -x -1= x^3 -1

c) x^2+ x^3 -x -x^2 +1 +x= x^3 + 1