Question

Solve the equation by completing the square: 3x2 - 24x = 27.
Enter the largest value of the coordinates.

Answer 1

assuming this is an on line course (enter the largest value is a hint) then just find the zeros without completing the square
if you want to know how to complete the square, that is a different problem

Answer 2

3x^2-24x-27=0 x^2-8x-9=0 (x-9)(x+1)=0 x=9 or x=-1 so the answer is 9

Answer 3

start with
\[x^2-8x-9=0\]
\[(x+1)(x-9)=0\]
\[x=-1,x=9\]