Question

What is the sum of the polynomials?

Answer 1

If you have to find the sum of the polynomials $(7x^3 - 4x^2) + (2x^3 - 4x^2)=7x^3-4x^2+2x^3-4x^2$, then you have:

1. group all terms that have equal degrees

$7x^3+2x^3 \text{ and } -4x^2-4x^2$.

2. Add the coefficients near terms of equal degree

7+2=9,

-4-4=-8.

3. Write the sum as $9x^3-8x^2$.

Answer: correct choice is D.

Answer 2

(7x3 – 4x2) + (2x3 – 4x2) = 9x3 – 8x2