Question

If x+y is 3 and x² +y² is 5 then predict x and y
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Answer 1

Answer:

xy is 2

Step-by-step explanation:

GIVEN :

x+y= 3

x² + y² = 5

xy = ?

We have to find the value of xy, then we should use the formula of (x+y)² = x² + y² + 2xy

Substitute the value in the identity.

(x+y)² = x² + y² + 2xy

(3)² = 5 + 2xy

9 = 5 + 2xy

2xy = 9 - 5

2xy = 4

xy = 4/2

xy = 2

Therefore, the value of xy is 2.