Question

Amy, since you know something about algebra, you can probably help me out with this. what is the value of x in the equation x2 + 3x = 22?

Answer 1

I am not Amy but I would love to help you.


$x^2 + 3x = 22$

$x^2+ 3x - 22 = 0$

$\Bigg( {Formula: \ x = \frac{-b \pm \sqrt{b^2 -4ac} }{2a} \Bigg)$ 

$a = 1, \ b = 3, \ c = -22$

$x = \frac{-3 \pm \sqrt{3^2 -4(1)(-22)} }{2(1)}$

$x = 3.42 \ or -6.42$