Question

Someone help!!!

X=-3y^2+30y
Please explain how to do the equation step by step so i can understand.

Answer 1

what does "do \(x=-3y^2+3y\)" mean?

Answer 2

possibly factor it

Answer 3

maybe it means find the parabola, vertex, focus etc
but maybe not
are there any instructions?

Answer 4

there is no such mathematical operation as "do"

Answer 5

Hey, my computer shut down and I had to go through a lot to turn it on. Sorry :(

Answer 6

So I know this is a parabola, its just I'm having a tough time trying to put it in standard form

Answer 7

oooh ok

Answer 8

thanks :D

Answer 9

\[x=-3y^2+30y \]\[x=-3(y^2-10y)\] \[x=-3(y-5)^2+75\]

Answer 10

or
\[x-75=-3(y-5)^2\]

Answer 11

How did you get 75

Answer 12

good question
did you get the first step?

Answer 13

Yes, -3(y^2-10y), you factored out the -3,

Answer 14

And then you divided the 10 by 2,

Answer 15

then to complete the square take have of ten which is 5 and write
\[x=-3(y-5)^3+??\]

Answer 16

25+?

Answer 17

I don't know the other number

Answer 18

now \(5^2=25\) and \(-3\times 25=-75\) so by making that change you have subtracted 75
you can either subtract it from the other side or add it back to the right side

Answer 19

thanks, pal Now my brain woke up. That's the last step I was missing.

Answer 20

I'm blast234

Answer 21

I have sibilings who come here :D

Answer 22

must be a busy computer

Answer 23

Maybe thats why, but most of them are unfamiliar