Question

Wykonaj działania +,−,*

W(x)=2x^3+2x^2−8x−8

P(x)=x^3-x^2-5-3x

Answer 1

W(x)+P(x)

(2x^3+2x^2−8x−8)+(x^3-x^2-5-3x)=2x^3+2x^2−8x−8+x^3-x^2-5-3x=3x^3+x^2-11x-13

 

W(x)-P(x)

(2x^3+2x^2−8x−8)-(x^3-x^2-5-3x)=2x^3+2x^2−8x−8-x^3+x^2+5+3x=x^3+3x^2-5x-3

 

W(x)*P(x)

(2x^3+2x^2−8x−8)*(x^3-x^2-5-3x)=
2x^6-2x^5-10x^3-6x^4+2x^5-2x^4-10x^2-6x^3-8x^3+8x^3+40x+24x^2-8x^3+8x^2+40+24x=
2x^6-8x^4-24^3+22x^2+64x+40