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q4) Factorise 

i)

a ^ 4 - b ^ 4

Answers (1)

best_answer

We have,
             a ^ 4 - b ^ 4 =  (a^{2})^{2} - (b^{2})^{2} = (a^{2} - b^{2})(a^{2} + b^{2}) = (a-b)(a+b)(a^{2} + b^{2})
                                                                                                                                                                     using \ (x^{2} - y^{2}) = (x-y)(x+y)

Posted by

Gautam harsolia

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