Answer:
12x^3 + 84x^2 -5x -35
Step-by-step explanation:
multiply both of the polynomials together
12x^2 -5 * x + 7
First, multiply x with everything
12x^2 -5 * x = 12x^3 -5x
then, multiply 7 by everything
12x^2 -5 * 7 = 84 ^2 - 35
Last, add both of them together
12x^3 - 5x + 84x^2 - 35 = 12x^3 + 84x^2 -5x -35
12x^3 + 84x^2 -5x -35
