SOLUTION: 5x^2-2x-3=15.find x

Question 762610: 5x^2-2x-3=15.find x
Answer by tommyt3rd(5050) (Show Source): You can put this solution on YOUR website!
a=5, b=-2, c=-18

Solved by pluggable solver: SOLVE quadratic equation with variable

Quadratic equation (in our case ) has the following solutons:

For these solutions to exist, the discriminant should not be a negative number.

First, we need to compute the discriminant : .

Discriminant d=364 is greater than zero. That means that there are two solutions: .

Quadratic expression can be factored:

Again, the answer is: 2.10787840283389, -1.70787840283389. Here's your graph:

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