Question

If x-y=3 , xy=10 than find x+y​

Answer 1

Answer:

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Answer 2

Answer:

Answer

Correct option is

A

29

Given that: x−y=3 And xy = 10

Using the given identity: (a−b)

2

= a

2

−2ab+b

2

So, (x−y)

2

= x

2

−2xy+y

2

⇒ (x−y)

2

= x

2

−2(10)+y

2

⇒ (3)

2

= x

2

−20+y

2

⇒ 9 = x

2

+y

2

−20

⇒ 9+20 =x

2

+y

2

⇒ x

2

+y

2

= 29

The correct answer is x

2

+y

2

=29