Question

Find the vertex form of the function then find the following a) intercepts b) vertex c) maximum or minimum d) range

s(x)=-5x^2-30x-40

Answer 1

vertex form; y = 5(x - 3)² - 85
x-intercept; (3, +√17, 0) , (3 -√17, 0)
y-intercept; (0, -40)
minimum value at -85
range; [-85, ∞), y

hope this helps, God bless!