The gradient of a curve y= ax^2 +bx at the point (2,4) is -8, calculate the values of a and b
. Specifically, at (2,4), .
However...we have one equation, two variables. Can't really find a unique solution (a,b). However, we do know that, for the original equation, when x = 2, y = 4.
, so we have the system
Solve the system of equations.