Question

Sendo A(x)= 8x ^2 - 7x-5, B(x)= 3x^3 - 4x^2 e C(x)=2x^2+9x+3, determine:

A) A+B+C

B) A-C

C) 3B-A

Answer 1

a) A+B+C=(8x^2-7x-5)+(3x^3-4x^2)+(2x^2+9x+3)=C=8x^2-7x-5+3x^3-4x^2+2x^2+9x+3=3x^3+14x^2+2x^2+2x-2