SOLUTION: Solve by applying the Quadratic Formula. Show the work so I can do my other problems please. Q: x^2+18x+58=0

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equation Customizable Word Problems -> SOLUTION: Solve by applying the Quadratic Formula. Show the work so I can do my other problems please. Q: x^2+18x+58=0      Log On


   

Question 230310: Solve by applying the Quadratic Formula. Show the work so I can do my other problems please.
Q: x^2+18x+58=0
Found 2 solutions by mando271, solver91311:
Answer by mando271(42) About Me  (Show Source):
You can put this solution on YOUR website!
quadratic formula is x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+
x+=+%28-18+%2B-+sqrt%28+18%5E2-4%2A1%2A58+%29%29%2F%282%2A1%29+
x+=+%28-18+%2B-+sqrt%28+324-232+%29%29%2F%282%29+
x+=+%28-18+%2B-+sqrt%28+92+%29%29%2F%282%29+
x+=+%28-18+%2B-+2%2Asqrt%28+23+%29%29%2F%282%29+
x+=+%28-9+%2B-+sqrt%28+23+%29%29+

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



is already in Standard Form, namely:



So you can determine the coefficient values by inspection, , , and

Just plug these values into the quadratic formula.





Now all you need to do is the arithmetic. Depending on how your instructor has asked for the answers -- does s/he want the exact answer (left in terms of a radical) or a numerical approximation? -- you will either simplify the expression above (the radical part should reduce to ), or just punch the numbers into your calculator and then round the result appropriately.

John