# How do you solve 2x^2 - 28x + 98 = 0 using the quadratic formula?

Mar 19, 2016

#### Answer:

Double root at x = 7

#### Explanation:

$y = {x}^{2} - 14 x + 49 = 0$
$D = {d}^{2} = {b}^{2} - 4 a c = 196 - 196 = 0$
There is a double-root at $x = - \frac{b}{2 a} = \frac{14}{2} = 7$