# How do you solve 7x^2 - 7x - 2x + 2 = 0?

Apr 8, 2016

$1 \mathmr{and} \frac{2}{7}$

#### Explanation:

$y = 7 {x}^{2} - 9 x + 2 = 0.$
Since (a + b + c = 0), use shortcut. The 2 real roots are: 1 and
$\frac{c}{a} = \frac{2}{7} ,$

Reminder of Shortcut.

• When a + b + c = 0 --> the 2 real roots are: 1 and (c/a)
• When a - b + c = 0 --> the 2 real roots are: -1 and (- c/a)

Try to remember this Shortcut. It will save you a lot of time and effort.