View Full Version : Quadratics Equation
catfish-
Apr 10, 2012, 04:42 PM
a) Find the values of k and c in the equation y=c+kx-x^2
b) Find the co-ordinates of the highest point of the graph.
Please help, thank you!
rpray2007
Apr 10, 2012, 04:59 PM
Would be glad to help and if you tell us where you are stuck, we're more than happy to help.
Basically, you have to use your standard quadratic formula
x{\small_1}=\frac{-b\pm\sqrt{b^2-4ac}}{2a}
In your case, k is the same as b and a is -1
Good luck.
catfish-
Apr 10, 2012, 05:23 PM
Thank you for your help, I don't know how to use the quadratic formula to solve this. Will the answer be numbers or an expression?
rpray2007
Apr 11, 2012, 10:27 PM
It will be an expression as you do not have any number for c, k and b .