Question

If x² + y² = 15 and xy = 5 , find the value of (x +y )

Answer 1

Answer:

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Answer 2

We have to solve this question using formula.

Formula:

(a+b)^2 = a^2 + b^2 + 2ab

Here:

a = x

b = y

Solution:

(x+y)^2 = x^2 + y^2 + 2xy

(x+y)^2 = 15 + 2(5)

(x+y)^2 = 15 + 10

(x+y)^2 = 25

x+y = √25

x+y = 5

Therefore, x+y = 5.

Hope it helps!