SOLUTION: give exact and approximate solution to three decimal places x^2+14x+49=1

Question 545590: give exact and approximate solution to three decimal places
x^2+14x+49=1

Answer by jerryguo41(197) (Show Source): You can put this solution on YOUR website!

1) Move one over by subtracting 1 on both sides
{{x^2+14x+48=0}}}

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=4 is greater than zero. That means that there are two solutions: .

Quadratic expression can be factored:

Again, the answer is: -6, -8. Here's your graph:

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