Question

The vertex of the parabola y=x^2-7x+9 is at

Answer 1

what you want to do with the equation? find the x?

Answer 2

this is bthe question

Answer 3

the*

Answer 4

oh okay. factorise it as like this y= a(x-b)^2 + c. you know how to do it right?

Answer 5

no i dont i kinda of forgot cud u write it out i may know how to if i see it written out as a problem

Answer 6

wait. let me work it out first

Answer 7

ok

Answer 8

well this is what my teacher taught me

y= x^2 - 7x +9
y= (x^2 - 7x + __ ) + 9
y= (x^2 -7x + 12.5) + 9 - 12.5
y= (x-3.5)^2 - 3.25 ---> the answer

can you figure it out?

Answer 9

is the 2nd step missing something

Answer 10

yeah. because we dont know what's the thing, so we leave it blank. you know how to do it?