SOLUTION: how do you solve x^2+x-5=0 and come out with the answer

Question 383666: how do you solve x^2+x-5=0 and come out with the answer
Answer by Alan3354(69443) (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=21 is greater than zero. That means that there are two solutions: .

Quadratic expression can be factored:

Again, the answer is: 1.79128784747792, -2.79128784747792. Here's your graph:

RELATED QUESTIONS
how do you come up with the answer to this equation x-y=5 and... (answered by solver91311)

2x^2-5=-55 2x^2-50=0 2(x^2-25)=0 2(x-5)=0 2(x+5)=0 x=5 x=5 I checked my work... (answered by scott8148)

Hi! Given a sequence like this: when n=1, x=1 when n=2, x=5 when n=3, x=9 when n=4,... (answered by scott8148)

How do i solve log64^8=x The answer is 1/2 but how do you come about that answer?... (answered by jim_thompson5910)

I am not sure if this belongs here or not. My question: How do you solve or what... (answered by jim_thompson5910)

Simplify. 7x+28/x^2 +4x Answer is 7/x. How do you come up with this?... (answered by Alan3354)

Solve the equation 2^x-1 = 8. Give solution in fractional form. Can you show me how (answered by Alan3354)

I am trying to figure how to find part of answer to this non-linear system: (X+1)^2 -... (answered by ikleyn)

I need help with two more problems. They do not come from a book. I know the answers but... (answered by scott8148)