Question

Find the y-coordinate of the vertex:
f(2) = 2^2- 4(2) - 5.

Answer 1

Answer:

Step-by-step explanation:

f(2)=2²-4(2)-5

f(x)=x²-4x-5

=x²-4x+4-4-5

=(x-2)²-9

vertex is (2,-9)

y co-ordinate of the vertex is -9