How do you solve #6r ^ { 2} - 75= - 15r#?

Question

879 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2017-03-31T15:59:08

#X= 2.5 or -5#

Well, this is a quadratic function so you start by getting into quad form.
#Ax^2+Bx+C=0#

So here's what it comes out to be.

#6r^2+15r-75=0#

Now we just put it into the quadratic formula which I'm sure you know is

From there you simply plug in your A, B, and C and solve!

The answer comes out to be

X= 2.5 or -5

Let me know if this helped or if you need help in the future with math/science!