SOLUTION: 2x(x+1)=7

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Question 343890: 2x(x+1)=7
Found 2 solutions by Fombitz, ewatrrr:
Answer by Fombitz(32388)   (Show Source): You can put this solution on YOUR website!


Use the quadratic formula,
Answer by ewatrrr(24785)   (Show Source): You can put this solution on YOUR website!
NEED TO KNOW:
TYPE OF EQUATION NEEDED TO USE THE QUADRATIC FORMULA TO SOLVE THE PROBLEM

2x(x+1)=7
DISTRIBUTE AND SIMPIFY


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=60 is greater than zero. That means that there are two solutions: .




Quadratic expression can be factored:

Again, the answer is: 1.43649167310371, -2.43649167310371. Here's your graph:
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