Question

Multiply the polynomial (12x^4 - 4x^3 + 5) by (-4x^2) *

0 -16x^6 + 8x^5 + 9x12
048x^6 - 16x^6 + 20x^2
048x^6 + 16x^5 + 20x^2
0 -48x^6 + 16x^5 - 20x^2

Answer 1

`- 48 {x}^(6) + 16 {x}^(5) - 20 {x}^(2)`

Option D is the correct option.

Solution,

`- 4 {x}^(2) (12 {x}^(4) - 4 {x}^(3) + 5) \\ = - 4 {x}^(2) * 12 {x}^(4) + 4 {x}^(2) * 4 {x}^(3) - 4 {x}^(2) * 5 \\ = - 48 {x}^(6) + 16 {x}^(5) - 20 {x}^(2)`

hope this helps...

Good luck on your assignment...