Question

What is the axis of symmetry of the function f(x)=−(x+9)(x−21)?

Answer 1

Answer:

Therefore the given equation is a parabolic equation with vertex at (6,255) and the axis of symmetry is given by x = 6.

Step-by-step explanation:

i) f(x) = -(x+9)(x-21)

ii) therefore y = f(x) = -$x^{2}$ + 12x + 189 =  - ($x^{2}$ - 12x +36) + 36 + 189

iii) therefore y = f(x) = - $(x-6)^{2}$+ 225

iv) when x = 6 then y = 255

Therefore the given equation is a parabolic equation with vertex at (6,255) and the axis of symmetry is given by x = 6.

Answer 2

Answer:

c

Step-by-step explanation:

lol just took the quiz x=6