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गुणनखंड

Question
CBSEHHIMAH8004072

गुणनखंड कीजिए:
4 straight p squared space minus space 9 straight q squared

Solution

∵          4 straight p squared minus 9 straight q squared space equals space left parenthesis 2 straight p right parenthesis squared space minus space left parenthesis 3 straight q right parenthesis squared
                           = (2p - 3q) (2p + 3q) [∵ space space straight a squared minus straight b squared space equals space left parenthesis straight a plus straight b right parenthesis space left parenthesis straight a minus straight b right parenthesis]
∴       4 straight p squared minus 9 straight q squared space equals space left parenthesis 2 straight p minus 3 straight q right parenthesis space left parenthesis 2 straight p plus 3 straight q right parenthesis