Question

Multiply (5x2 + x − 4)(x + 2).

Answer 1

(5x^2 + x - 4)(x + 2) =
x(5x^2 + x - 4) + 2(5x^2 + x - 4) = 5x^3 + x^2 - 4x + 10x^2 + 2x - 8 =
5x^3 + 11x^2 - 2x - 8 <===

Answer 2

Answer: The answer is
`5x^3+11x^2-2x-8`.

Explanation:

Here, the given expression is,

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

By multiplying,

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

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

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

Thus, We can write,

`(5x^2+x-4)(x+2)=5x^3+11x^2-2x-8`