Question

What is the product? (2x-1)(x+4)

Answer 1

2x^2+7x-4; 2x times x =2x^2; +8x from 2x times 4; minus x from -1 times x; minus 4 from -1x4.

Answer 2

`2x^(2)+7x-4`

Explanation:

We are given to find the product of (2x-1) and (x+4).

So, we have,

`(2x-1)(x+4)` =
`2x^(2)+8x-x-4` =
`2x^(2)+7x-4`.

Thus, the product of (2x-1) and (x+4) is
`2x^(2)+7x-4`.

i.e.
`(2x-1)(x+4)` =
`2x^(2)+7x-4`.