Question

2.
of x + y = 10 and xy = 21 find 2(x²+y²)​

Answer 1

Answer:

Given :-

x + y = 10 , xy = 21

To Find :-

2(x² + y²)

Formula Used :-

a²+ b² = ( a+b )² - 2ab

Solution :-

2(x² + y²)

2(x+y)² - 2xy

2(10)² - 2(21)

2(100) - 42

200 - 42

= 158

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