SOLUTION: Use the quadratic formula to solve the following equation 1.21z^2+5.28z+5.76=0. Convert the answer into an improper fraction.

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equation Customizable Word Problems -> SOLUTION: Use the quadratic formula to solve the following equation 1.21z^2+5.28z+5.76=0. Convert the answer into an improper fraction.      Log On


   

Question 57287: Use the quadratic formula to solve the following equation 1.21z^2+5.28z+5.76=0. Convert the answer into an improper fraction.
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
1.21z^2+5.28z+5.76=0.
z=[-5.28+-sqrt(5.28^2-4(1.21)(5.76)]/2(1.21)
z=[-5.28+-sqrt(0)]/2.42
z=[-5.28]/[2.42]
z=-2 2/11 with multiplicity two
Cheers,
Stan H.