Question

Help with both questions please!​

Answer 1

1) D. 10x^6 + 10x^2 - 6x^3 - 6

2) B. 5x^3 + 11x^2 - 2x - 8

Explanation:

(7x^6 + 10 x^2 - 10) + (3x^6 - 6x^3 + 4)

= 7x^6 + 10x^2 - 10 + 3x^6 - 6x^3 + 4

= 7x^6 + 3x^6 - 6x^3 + 10x^2 - 10 + 4

= 10x^6 - 6x^3 + 10x^2 - 6

= 10x^6 + 10x^2 - 6x^3 - 6

(5x^2 + x - 4)(x + 2)

= 5x^3 + 10x^2 + x^2 + 2x - 4x - 8

= 5x^3 + 11x^2 - 2x - 8