if X + Y = 25 and X * Y = 4 find X - Y using identity
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x+y=25 and xy=4
then (x-y)2 = (x+y)2–4xy
(x-y)2 = (25)2 - 4×4
(x-y)2 = 625 - 16
(x-y)2 = 609
X-Y = 24.677
Okk.
then (x-y)2 = (x+y)2–4xy
(x-y)2 = (25)2 - 4×4
(x-y)2 = 625 - 16
(x-y)2 = 609
X-Y = 24.677
Okk.
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