First, the general score: 240 xy/(x 2-y 2) = 288,

Then 240 x 2/(x 2-y 2) = 288 x/y

Then 240/( 1-y 2/x 2) = 288 x/y,

Let x/y=t and get 240/(1-1/t 2) = 288t.

So 240=288(t- 1/t)

So 240t = 288t 2-288.

So =-2/3 or t=3/2 to solve the equation.

The value of so 288x/y is-192 or 432.

PS: The general division steps are as follows.

[ 120/(x+y)+ 120/(x-y)]y

= { 120(x-y)/[(x+y)(x-y)]+ 120(x+y)/[(x+y)(x-y)]} y

= {[ 120(x-y)+ 120(x+y)]/[(x+y)(x-y)]} y

=[240x/(x^2-y^2)]y

=240xy/(x^2-y^2)

PS again:

The upper solution is 240t = 288t 2-288, that is, 288t 2-288-240t = 0.

Divide both sides of the equation by 48 at the same time and you get

6t^2-5t-6=0

After we get here, we can use the general method to solve the quadratic equation of one variable. Of course, the fastest and most convenient way is to use cross multiplication, that is, directly match (3t+2)*(2t-3)=0 to get the answer ~ ~

PS is the abbreviation of postscript (remark, which can also be interpreted as postscript and postscript)

Origin: (after signing at the end of the letter) Furthermore, and; P.S., P.S. , PS or p.s.

Ask me if you have any questions, and I will continue to answer them for you ~ ~ ~ Hehe ... Should my complete answer be rewarded? . . - _ -