Question

solve karo jaldi aur answer attach karo​

Answer 1

Solution

Given :-

• x² + y² = 11 _______(1)
• xy = -1 ___________(2)

Find ;-

• Value of x + y & x - y

Explanation

We know,

★ x + y = √(x²+y²) + 2xy

★ x - y = √(x² + y²)- 2xy

So,

➡ x + y = ±√[(11) + 2×-1]

➡x + y = ±√[11 - 2]

➡x + y = ±√9

➡x + y = ± 3

Now, Again,

➡ x - y = √(x² + y²) - 2xy

➡x - y = ±√[11 - 2×-1]

➡x - y = ±√[11 + 2]

➡x - y = ±√13

Hence

• Value of x + y = ±3
• Value of x - y = ± √13

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