Question

How do you solve this problem using the quadratic formula
http://oi44.tinypic.com/sgl4eu.jpg

Answer 1

What is the equation?

Answer 2

Oh...the asker is absent.

Answer 3

Do you know the theorem: when two secants intersect outside the circle, the products of their segments are equal.

Answer 4

Sorry about that...

Answer 5

That's the formula

Answer 6

So using that theorem: 3x(x)=8(x+2)
3x^2=8x+16
3x^2-8x-16=0
a+3, b=-8, c = -16

Answer 7

Plug those numbers into the quadratic formula.

Answer 8

ok