heyyyyy solution plzz
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use a^2-b^2=(a-b)*(a+b). I hope this will help you.
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siu58:
whats udentity u use
i am not ubderstant
which step u have doubt?
first I took minus common, then i used the identity (a+b)^2=a^2+b^2+2ab. After that, I used identity a^2-b^2=(a-b)*(a+b). Hope you got it.
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