# How do you write y= -3x^2 + 21x in factored form?

Jun 20, 2018

$- 3 x \left(x - 7\right)$

#### Explanation:

Both terms have a $- 3 x$ in common, so we can factor that out. We'll get

$- 3 x \left(x - 7\right)$

We cannot factor the above expression further, so this is our answer.

Hope this helps!