SOLUTION: After getting to the end of 2x(squared)-5x-8=0, I get 5 plus/minus the square root of 89 over 4. What happens next? I don't know what to do with it.

Algebra ->  Quadratic Equations and Parabolas -> SOLUTION: After getting to the end of 2x(squared)-5x-8=0, I get 5 plus/minus the square root of 89 over 4. What happens next? I don't know what to do with it.      Log On


   

Question 292545: After getting to the end of 2x(squared)-5x-8=0, I get 5 plus/minus the square root of 89 over 4. What happens next? I don't know what to do with it.
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
That's the exact answer.
You can get an approximate decimal answer if you like.
x1=%285%2Bsqrt%2889%29%29%2F4=3.61
x2=%285-sqrt%2889%29%29%2F4=-1.11
.
.
.
and then check your solution graphically,
+graph%28+300%2C+300%2C+-5%2C+5%2C+-10%2C+10%2C2x%5E2-5x-8%29+