Write the equation of the parabola in vertex form

Step-by-step explanation:

The general vertex form of parabola is,

where,

is the vertex,

is the axis of symmetry.

Given the coordinates of the vertex as and focus as

a is the 4 times the distance between the vertex and the focus.

The distance between the vertex and focus is -3. Negative is because we are calculating the distance to the left (-ve x direction) of the vertex.

Hence,

Putting the values in the general equation,

i.e

-7

step-by-step explanation:

x^2 + 18x + 74 = (x + 9)^2 - 81 + 74

= (x + 9)^2 - 7.

so q = -7.

justin bieber ml.