Solve this quadratic equation
x^2 + 5x + 3 = 0
3 answers
@writeacher, can you help my friend out?
one way is to complete the square:
x^2 + 5x + 3 = 0
x^2 + 5x = -3
x^2 + 5/x + (5/2)^2 = -3 + (5/2)^2
(x + 5/2)^2 = 13/4
x + 5/2 = ±√13/2
x = (-5±√13)/2
You get the same answer using the quadratic formula.
x^2 + 5x + 3 = 0
x^2 + 5x = -3
x^2 + 5/x + (5/2)^2 = -3 + (5/2)^2
(x + 5/2)^2 = 13/4
x + 5/2 = ±√13/2
x = (-5±√13)/2
You get the same answer using the quadratic formula.
thank you steve for helping my friend here, he's new to the website, I had to help him through it. :)
5 answers