Question

1. Find the square root of the following

Answer 1

${x}^{2} + {y}^{2} - 2xy + 4xy \\ = {x }^{2} + {y}^{2} + 2xy$
and (x+y)2

Answer 2

Solution :

√ [ ( x - y )² + 4xy ]

= √ [ x² + y² - 2xy + 4xy ]

= √ [ x² + y² + 2xy ]

= √ ( x + y )²

= x + y

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