if x-y =12 and xy= 25/4,find x+y
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Answered by
4
Hello users ...
we have given that
x-y=12 and xy=25/4
we have to find
x+y =?
solution:-
we know that
(x+y)² = (x-y)²+4xy
here
(x+y)² = 12² + 4×25/4
=> 144 +25 = 169
=> x+y = √169 = 13 answer
⭐⭐ hope it helps ⭐⭐
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VibhorPal:
but after -2xy and +4xy are calculated,there comes +2xy. Then why we multiply with 4xy instead of 2xy
Answered by
2
Is it correct
Please tell if no sorry
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