SOLUTION: Ix x>0, y>0 and {{{x^2 -y^2 =2xy}}}, find the exact value of {{{x/y}}}. Thanks.

Algebra.Com
Question 1126756: Ix x>0, y>0 and , find the exact value of .

Thanks.

Found 2 solutions by josgarithmetic, ikleyn:
Answer by josgarithmetic(39616)   (Show Source): You can put this solution on YOUR website!
.
Answer by ikleyn(52776)   (Show Source): You can put this solution on YOUR website!
.
The original equation is


     -  = 2xy.


Divide both sides by    (which is not zero !).  You will get


     - 1 = .


Introduce new variable  t = .   Then the last equation takes the form


     - 2t - 1 = 0.


It is a quadratic equation on t. Solve it using the quadratic formula


     =  =  = .


Answer.  The ratio  ,  where x > 0 and y > 0 satisfy the given equation, is  .

Solved.

-----------------

Naturally,  this solution has  N O T H I N G    C O M M O N  with the answer and solution by  @josgarithmetic,

whose post is   T O T A L L Y   I R R E L E V A N T  to the given problem.


As usual.

------------------

@josgarithmetic is VERY well known  (or better to say,  very badly known,  unfortunately)  in this forum,
for his inability to solve problems correctly and to make calculations accurately.


So be very careful when you obtain "solutions" from him.

In half of all cases  (if not at most cases)  they are wrong.

Do not trust him and always wait for reaction of other tutors.


In the normal school environment he would be fired in the second day.


I think about thousands of visitors and students who do understand almost nothing in Math and who were misguided
by his false and wrong quasi- and pseudo-"solutions".


People,  be careful about  @josgarithmetic  !   !    !




RELATED QUESTIONS

If x > 0 and y> 0 and x^2 - y^2 = 2xy, find the exact value of... (answered by ikleyn)
If (x +iy)^9 - (ix+y)^9 = 2i, find the value of x, y ? (answered by greenestamps)
x^2-2xy+y^2=0 (answered by Edwin McCravy)
x^2-2xy+y^2=0 (answered by satyareddy22)
Let x and y be real numbers. Find the maximum value of (x + y)^2, if x and y satisfy x^2 (answered by CPhill,ikleyn,Edwin McCravy)
x and y are integers x^2+2xy+y^2-y-100x = 0 Find x and... (answered by richwmiller)
Find the exact value if 0 < x < pi/2 and 0 < y < pi/2 ; sin(x+y) if sin(x) = 3/5 and... (answered by fractalier)
Let x=1 and y=2. Find the value of the given capital letter. N=x^2+2xy+y^2+1 N=... (answered by Fombitz,krutarthas,Shin123)
find the value of y x + 1/2 y=0 (answered by josgarithmetic,ikleyn,math_helper)