factorise: x⁴+y⁴-4xy
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Answer:
Given⁴ - y⁴
= ( x² )² - ( y² )²
{ Using identity
a² - b² = ( a + b ) ( a - b ) }
= ( x² + y² ) ( x² - y² )
Again using the identity
= ( x² + y² ) [ ( x )² - ( y )² ]
= ( x² + y² ) ( x + y ) ( x - y )
^^"
Step-by-step explanation:
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