Question

What is the product?

(2 x minus 1)(x + 4)

Answer 1

18

Explanation:

PEMDAS

What is X? Lets say X is 5.

2x5-1=9

5+4=9

9+9=18

Answer 2

`(2x - 1)(x + 4) \\ = 2x {}^(2) + 8x - x - 4 \\ = 2x {}^(2) + 7x - 4 \\ = 2x {}^(2) + 8x - x - 4 \\ = 2x(x + 4) - (x + 4) \\ = (2x - 1) (x + 4) \\ \alpha = 1 / 2 = 0.5 \\ \beta = - 4`

So the solution is 1/2