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

Hello,

y=-(x+9)(x-21)=-(x²-12x-189)=-(x²-2*6x+36)+189+36
=-(x-6)²+225

Vertex: (6,225)
Axis of symmetry: x=6

Idont knowgfdhdhfhggg.

step-by-step explanation:

when the line is solid:

it's either < or >

when the line is dashed:

it's either < or >

this > inequality sign means:

greater thanmore thanaboveexceeds

this < inequality sign means:

less thanfewer thanbelow

this > inequality sign means:

greater than/equal tono less thanat leastminimum of

this < inequality sign means:

less than/equal tono more thanat mostmaximum of

about the problem:

since the line is solid, that means it's either < or >

srry i'm not done ! i'll