Question

If x + y = 5 and x²+y² =15, then xy is equal to​

Answer 1

Answer:

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Answer 2

$\huge\underline\mathfrak\purple{Answer}$

x + y = 5

x² + y² = 15

( x + y )² = x² + y² + 2xy

5² = 15 + 2xy

25 - 15 = 2xy

20 = 2xy

The value of xy = 10

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