Question

Find x-y if x+y=11 &xy=2

Answer 1

Heya

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( x- y ) = √ { ( x + y )² - 4xy }

=>

( x - y ) = √ { (11)² - 4 ( 2 ) }

=>

( x - y ) = √( 121 - 8 )

=>

( x - y ) = √ (113)