First you need to see that this is a quadratic. I need.to put all of the values on one side of equation to see what I got. 6r^2 + 7r + 8 = 6 6r^2 + 7r + 2 = 0
Now this one is difficult to factor so i will use quadratic equation: [-b (+-) sqrt (b^2 - 4ac)] / (2a)
we know that a b and c are in a quadratic at these positions. ax^2 + bx + c