SOLUTION: Solve the quadratic equation formula.

Algebra.Com
Question 305451: Solve the quadratic equation formula.
Found 2 solutions by edjones, richwmiller:
Answer by edjones(8007)   (Show Source): You can put this solution on YOUR website!
x^2-2x-13=0
x^2-2x =13
x^2-2x+1=14 completing the square.
(x-1)^2=14
x-1=+-sqrt(14)
x=1+sqrt(14), x=1-sqrt(14)
.
Ed
.
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=56 is greater than zero. That means that there are two solutions: .




Quadratic expression can be factored:

Again, the answer is: 4.74165738677394, -2.74165738677394. Here's your graph:
Answer by richwmiller(17219)   (Show Source): You can put this solution on YOUR website!
Instructions on how to write squared or second power are on the submit page. Read it and try again.
RELATED QUESTIONS

solve the equation with the quadratic formula:... (answered by Alan3354,jim_thompson5910)
solve the equation with the quadratic formula:... (answered by jim_thompson5910)
solve the equation with the quadratic formula:... (answered by RAY100)
Solve the equation using the quadratic formula. 2x2 = -12x - 3 (answered by checkley77)
Solve the equation using the quadratic formula. 2x^2 =... (answered by oberobic)
Solve the equation using the quadratic formula. 2x^2 =... (answered by solver91311)
Solve the equation using the quadratic formula. 2x^2 = 30 (answered by dabanfield)
use the quadratic formula to solve the equation 3x² =... (answered by Fombitz)
solve the equation using the quadratic formula... (answered by lynnlo)