SOLUTION: solve x^2+5x-7 to give the exact solutions and then give approximate solutions to three decimal places. I can not figure it out Would you please help.

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: solve x^2+5x-7 to give the exact solutions and then give approximate solutions to three decimal places. I can not figure it out Would you please help.      Log On


   

Question 327251: solve x^2+5x-7 to give the exact solutions and then give approximate solutions to three decimal places. I can not figure it out Would you please help.
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!


Just use the quadratic formula.




where , , and



Do the arithmetic and simplify for the exact answer, then punch your calculator buttons for the numeric approximation. The discriminant is prime, so simplifying the expression is trivial.

John