SOLUTION: solve for x using the quadratic formula x2+8x-5=0

Algebra.Com
Question 101897: solve for x using the quadratic formula x2+8x-5=0
Answer by edjones(8007)   (Show Source): You can put this solution on YOUR website!
Solved by pluggable solver: SOLVE quadratic equation (work shown, graph etc)
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=84 is greater than zero. That means that there are two solutions: .




Quadratic expression can be factored:

Again, the answer is: 0.58257569495584, -8.58257569495584. Here's your graph:
RELATED QUESTIONS

Solve by using the quadratic formula: x2 – 8x – 9 =... (answered by vleith)
Solve this quadratic equation using the quadratic formula. x2 + 8x - 5 = 0 (answered by Fombitz)
Solve x^2 + 8x + 20 = 0 using the quadratic... (answered by Alan3354,MathLover1)
37. Solve by using the quadratic formula. x2 – 8x – 9 =... (answered by venugopalramana)
Solve using the quadratic formula:... (answered by mananth)
x^2 + 8x - 5 = 0 Solve this quadratic equation using the quadratic... (answered by jim_thompson5910)
Solve the following equation for x by using the quadratic formula: 2x^2 + 8x + 3 =... (answered by stanbon)
Solve the following equation for x by using the quadratic formula... (answered by Edwin McCravy)
Solve using the quadratic formula. 3x2 - 8x + 5 = 0. (answered by checkley75)