(x-y)=1, (x²+y²)=41 then (x+y)=?
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x2+y2=41
(x-y)2 +2xy= 41
xy = 20
(x+y )2= (x-y)2 +4xy
= 1 + 4x20
= 81
x+y = 9 Ans.
(x-y)2 +2xy= 41
xy = 20
(x+y )2= (x-y)2 +4xy
= 1 + 4x20
= 81
x+y = 9 Ans.
shad1:
but right answer is ±9
right answer +9 or -9
Answered by
0
Answer:
please mark me brilliant.
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