Question

Given f(x)=3x^2+18x+6 where is its vertex?

Answer 1

formula to find x coordinate of vertex \[\huge\rm x=\frac{ -b }{ 2a }\] and then substitute x in f(x) function for x value to find y

Answer 2

a and b are \[\huge\rm Ax^2+Bx+C=0\]
a=leading coefficient
b=middle term

Answer 3

so just solve it first

Answer 4

yes right first find x-coordinate

Answer 5

21x?

Answer 6

how did you get that ?

Answer 7

a= ??
b= ?

Answer 8

a=3x^2
b=18x

Answer 9

just the coefficient

Answer 10

so a=3
b=18 now use that formula that i posted bove

Answer 11

-3

Answer 12

nvm yes

Answer 13

now to find y coordinate of vertex
substitute all x in f(x) function for -3

Answer 14

so its -3, -21

Answer 15

yes right