SOLUTION: Use the quadratic formula to solve the equation x^2+7x+9=0. The formula is: x=-b √b^2-4ac/2 please help

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Question 1016453: Use the quadratic formula to solve the equation x^2+7x+9=0.
The formula is: x=-b √b^2-4ac/2
please help
Answer by macston(5194)   (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=13 is greater than zero. That means that there are two solutions: .




Quadratic expression can be factored:

Again, the answer is: -1.69722436226801, -5.30277563773199. Here's your graph:
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