# How do you factor and solve #x^2 + 3x = 28 #?

##### 1 Answer

Jul 14, 2016

(x - 4)(x + 7)

#### Explanation:

To factor it, find 2 numbers knowing sum (b = 3) and product (c = -28).

They make the factor pair: (-4, 7).

The 2 real roots are x = 4 and x = -7