Question

factorise the expression
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Answer 1

a⁴ - 2a²b² + b⁴

= ( a² )² - 2 . a² . b² + ( b² )²

= ( a² - b² )²

=( a² - b² ) ( a² - b² )

= ( a + b ) ( a - b ) ( a + b ) ( a - b )

________

Thanks!

Answer 2

hope it will help you