Question

Select ALL the quadratic functions that open UP

f(x) = -x² + 2x + 9
f(x) = 7x² - 8x - 53
g(x) = -2(x+3)² – 1
h(x) = 4(x-2)(x + 9)
f(x) = x² + 4x − 1

Answer 1

f(x) and g(x) are the quadratic functions that open UP.