Help Keep Boards Alive. Support us by going ad free today. See here: https://subscriptions.boards.ie/.

https://www.boards.ie/group/1878-subscribers-forum

Private Group for paid up members of Boards.ie. Join the club.

Hi all, please see this major site announcement: https://www.boards.ie/discussion/2058427594/boards-ie-2026

help please

08-11-2014 11:22PM

#1

mayogirlie1

Registered Users, Registered Users 2 Posts: 68 ✭✭

Join Date: May 2014

Posts: 55

If for all values of x (3p-2t)x + r -4t^2 =0 r =9p^2 would be so grateful cannot work ot out at all

0

Comments

#2 09-11-2014 12:05AM

bnt

Registered Users, Registered Users 2 Posts: 13,228 ✭✭✭✭

Join Date: April 2008

Posts: 12888

Can you post the whole question, verbatim? The way it's written there is confusing, I can't see what they're asking you to work out there. Is there missing punctuation?

In its pure form, fascism is the sum total of all irrational reactions of the average human character.
― Wilhelm Reich

0
#3 11-11-2014 01:11PM

ZorbaTehZ

Registered Users, Registered Users 2 Posts: 2,149 ✭✭✭

Join Date: August 2006

Posts: 2046

mayogirlie1 wrote: »

cannot work ot out at all

Not surprising since the question as stated is complete nonsense.

0
#4 11-11-2014 04:44PM

seandoiler

Registered Users, Registered Users 2 Posts: 107 ✭✭

Join Date: March 2006

Posts: 104

I assume that the question is

"if for all values of x, (3p-2t)x+r-4t^2=0, show that r=9p^2"

Let x=0; then (3p-2t)(0)+r-4t^2=0 and so r=4t^2.

Let x=1; then (3p-2t)(1)+r-4t^2=0, now using the fact that r=4t^2, then we have 3p-2t=0 and hence 3p=2t=sqrt(r) and so r=9p^2

0