# What is the standard form of y= (5x - 1) (x+1) ?

Apr 18, 2017

$y = 5 {x}^{2} + 4 x - 1$

#### Explanation:

Multiply the terms in the original equation:

$\left(5 {x}^{2}\right) + \left(5 x\right) - \left(1 x\right) - \left(1\right)$

Now combine terms including x:
$\left(5 {x}^{2}\right) + \left(4 x\right) - \left(1\right)$
This is the standard form of your original equation:
$y = 5 {x}^{2} + 4 x - 1$