Alien0029id
Answered

multiply the sum of 20x^2+9x-10 & -15x^2-5x+3by the difference of 3x^2-4x+2 & x^2+x+1

Sagot :

Faith20id
20x^2+9x-10 - 15x^2-5x+3 = 5x^2+4x-7
3x^2-4x+2 - x^2-x-1 = 2x^2-5x+1

(5x^2+4x-7)(2x^2-5x+1)=10x^4-25x^3+5x^2+8x^3-20x^2+4x-14x^2+35x-7
                                  = 10x^4-17x^3-29x^2+39x-7