Math Is Fun Forum

lqq889

Member

Registered: 2012-03-05

Posts: 15

math question help?

if

, P<0 has roots A and B, and

has roots

and

, find P and Q?

please help me, i try to find the roots of the 1st equation and roots of the 2nd equation and then square the roots of 1st equation, after that equate them to roots 2nd equation, solve the simutanous equation to find P and Q. does my working process correct ? but i can not get the answer.

Answer: P =

             Q= 36

please help me to solve this, thanks very much!

Bob

Administrator

Registered: 2010-06-20

Posts: 10,649

Re: math question help?

hi lqq889

Hard to comment on your method without seeing all your working.

Here's what I did:

By comparing the coefficients you can say:

Use equations 2 and 4 to get P etc etc.

Bob

---

Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob