SOLUTION: The completion of a certain chemical reaction is expressed by the equation y=12+4x-2(x*x). Y is the number of seconds needed to complete the reaction and x is the temperature in de

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons -> SOLUTION: The completion of a certain chemical reaction is expressed by the equation y=12+4x-2(x*x). Y is the number of seconds needed to complete the reaction and x is the temperature in de      Log On


   

Question 1150314: The completion of a certain chemical reaction is expressed by the equation y=12+4x-2(x*x). Y is the number of seconds needed to complete the reaction and x is the temperature in degrees CCelsius at which the reaction occurs. If the reaction is complete in 45 seconds, what is the temperature at which the reaction occurs?
Answer by ikleyn(52754) About Me  (Show Source):
You can put this solution on YOUR website!
.

The equation


    12 + 4x - 2x^2 = 45


Try to solve it.


    2x^2 - 4x + 33 = 0


    Discriminant  d = b^2 - 4ac = 4^2 - 4*2*33 = -248.


Discriminant is negative, so the equation has no solutions.


It looks like the problem is a   F A K E.