- #1

- 20

- 0

What value of

*k*would make 25x^2 - 60xy +

*k*y^2 a perfect square trinomial?

I just don't know where to begin in order to find

*k*. :uhh:

Any help would be much appreciated!

You are using an out of date browser. It may not display this or other websites correctly.

You should upgrade or use an alternative browser.

You should upgrade or use an alternative browser.

- Thread starter soggybread
- Start date

- #1

- 20

- 0

What value of

I just don't know where to begin in order to find

Any help would be much appreciated!

- #2

- 1,074

- 1

soggybread said:

What value ofkwould make 25x^2 - 60xy +ky^2 a perfect square trinomial?

I just don't know where to begin in order to findk. :uhh:

Any help would be much appreciated!

Ok well starting with a binomial (A + B)

then (A + B)

which is the same as

A

Which would be a perfect square trinomial so do you think you could right the trinomial in question in this form for some value of k?

- #3

HallsofIvy

Science Advisor

Homework Helper

- 41,847

- 966

Your formula is 25x

- #4

- 335

- 0

So you would get 60^2 = 4*25*k.

Moreover here the value of y does not matter if you look deep. The co-efficient of first power of x is 60y and the constant is ky^2

So (60y)^2 = 4*25*k*y^2.

- #5

- 20

- 0

Ah! Thank You Guys! I see how it works now!

Share: