Question 1121419
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<pre>
x^2 + y^2 = 120,     (1)
xy        =  24.     (2)


=====>  x^2 - 2xy + y^2 = 120 - 2*24 = 120 - 48 = 72  ====>  {{{(x-y)^2}}} = 72  


====>  x - y = +/- {{{sqrt(72)}}}.
</pre>

Solved.