Question 123708
(6+5x+6x^2+8x^3)+ (3-5x+6x^2-8x^3) write the numbers without the parentheses
6+5x+6x^2+8x^3+3-5x+6x^2-8x^3 Simplify the same kind terms
12x^2+9=3(4x^2+3)is the answer.