Mathematics

A critical point occurs where the derivative equals zero—that's where the function stops increasing or decreasing. Since $h$ is quadratic, its derivative is linear, and you can find it by differentiating term by term. Once you set that derivative equal to zero and use the condition that the critical point is at $x=2$, you'll have a single equation in $k$ to solve.

A critical point occurs where the derivative equals zero—that's where the function stops increasing or decreasing. Since $h$ is quadratic, its derivative is linear, and you can find it by differentiating term by term. Once you set that derivative equal to zero and use the condition that the critical point is at $x=2$, you'll have a single equation in $k$ to solve.