Question

Express f(x) in the form a(x − h)2 + k.
f(x) = − 3/4x^2 + 15x − 78

Answer 1

f(x) = − 3/4x^2 + 15x − 78
f(x) = -3/4 (x^2 - 20x + 104)
f(x) = -3/4 (x^2 - 20x + 100 + 4)
f(x) = -3/4 (x^2 - 20x + 100) - (3/4)*(4)
f(x) = -3/4 (x-10)^2 - 3

Answer 2

Thanks :)

Answer 3

welcome