SOLUTION: What are the roots of the equation {{{ x^2 + 3x - 18 = 0 }}}

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Question 695268: What are the roots of the equation
Answer by mouk(232)   (Show Source): You can put this solution on YOUR website!
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=81 is greater than zero. That means that there are two solutions: .




Quadratic expression can be factored:

Again, the answer is: 3, -6. Here's your graph:
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