SOLUTION: give exact and approximate solutions to three decimal places for: x^2+5x-7=0

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: give exact and approximate solutions to three decimal places for: x^2+5x-7=0      Log On


   



Question 337229: give exact and approximate solutions to three decimal places for:
x^2+5x-7=0

Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!


This doesn't factor, so use the quadratic formula:

, , and



Plug in the numbers and do the arithmetic.

John

My calculator said it, I believe it, that settles it