SOLUTION: 5x(to the second power)+ 21x +4 =

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Question 355685: 5x(to the second power)+ 21x +4 =
Answer by vleith(2983)   (Show Source): You can put this solution on YOUR website!
I assume you menat to include someting on the right side of the equality. I will further assume that was 0


So either or
Thus x = -1/5 or x = -4
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=361 is greater than zero. That means that there are two solutions: .




Quadratic expression can be factored:

Again, the answer is: -0.2, -4. Here's your graph:
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