A quadratic is written as f(x) = -3(x - 4) squared + 7. Where is its vertex?

1. Standard form for a quadratic is a times (x minus h) squared plus k, and (h, k) is the vertex. 2. Matching gives h equal to 4 and k equal to 7. 3. So the vertex sits at (4, 7). 4. Reading the sign inside the bracket as the sign of h would wrongly give negative 4. _Source: OpenStax Precalculus (CC BY 4.0), section 3.2 Quadratic Functions_