solve x^2+3x-5=0

Question

solve the quadratic equation

 

Answer 1

When all else fails, you can just plug this in to the quadratic equation. It's a little hard to read if I write it out in a text box, so I recommend you google it if you don't know it! All quadratic expressions can be written in the form ax^2+bx+c. So in this example a=1, b=3, c=-5. When you use those values in the quadratic formula, you'll find that the solutions are:

 

x=(-3+√(29))/2 , (-3-√(29))/2

Answer 2

x^2+3x-5=0

 

here we will use quadratic formula

 

x =( -3±√(3² - 4(1)(-5) ) / 2(1)

 

   =(-3 ± √ 9+20 )/2

 

    =(-3 ± √ 29 )/2