Question

Find the sum of the given polynomials.

3x2 + 2x - 5 and -4 + 7x2

10 x2 - 5 x - 1
- x2 + 9 x - 9
21 x2 + 2 x + 20
10 x2 + 2 x - 9

Answer 1

The answer is
D - 10 x2 + 2 x - 9

Answer 2

Number 4 would be your answer