Question

What is the vertex of the graph of y = 5(x + 4)^2 + 3?

Answer 1

computing the derivative you can find the behaviour of the function or if you didn't do the derivatives you can find the delta of the interception between the line y=k and the curve you gave.A delta equal to zero means two coinciding solutions ( the line is tangent to the curve) and that will be the vertex can you check if it is y= 5?

Answer 2

+3