SOLUTION: Solve {{{ x^2+18x-4=0 }}} The solution is x = ??? please simplify please help me i am really lost

Algebra ->  Quadratic Equations and Parabolas -> SOLUTION: Solve {{{ x^2+18x-4=0 }}} The solution is x = ??? please simplify please help me i am really lost       Log On


   

Question 359299: Solve
+x%5E2%2B18x-4=0+

The solution is x = ???

please simplify

please help me i am really lost
Answer by unlockmath(1688) About Me  (Show Source):
You can put this solution on YOUR website!
Hello,
For this one we'll need to us the following formula:
x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+
Plug in the numbers and work it out. I'll give you a head start:
x^2+18x-4
(-18+- sqrt(18^2-4*4)/2
rewritten as:
{-18+-sqrt(308)}/2
I'll let you figure the rest. Deal?
RJ
ww2w.math-unlock.com