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Question
CBSEHHIMAH8004095

गुणनखंड कीजिए: 
straight a to the power of 4 space minus space straight b to the power of 4

Solution

a4 - b4= (a2)2 - (b2)2
                                     [∵ a2 - b2 = (a - b) (a + b)]
= left parenthesis straight a squared space plus space straight b squared right parenthesis left parenthesis straight a squared space minus space straight b squared right parenthesis

  equals left parenthesis straight a squared space plus space straight b squared right parenthesis left square bracket left parenthesis straight a space plus space straight b right parenthesis space left parenthesis straight a space minus space straight b right parenthesis right square bracket
 = left parenthesis straight a squared space plus space straight b squared right parenthesis (a + b)(a - b)