Question

Determine the vertex of j(x) = (x - 8)(x + 3)

Answer 1

5/2 and -121/4

Explanation:

j(x) = x^2 - 5x - 24

j(x) = x^2 - 5x + (-5/2)^2 -(-5/2)^2 - 24

j(x) = (x-5/2)^2 -(-5/2)^2 - 24

j(x) = (x-5/2)^2 - 121/4

Hope it helped!!!