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this is your answer...
pardon me as I did it over an amazon invoice.
pardon me as I did it over an amazon invoice.
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jinu7:
I thik 1st we have to rationalise it and then use the id.
a^2+b^2=(a+b)(a-b)
no
a^2 - b^2 = (a+b)(a-b)
a^2 + b^2 is never equal to (a+b)(a-b)
(a+b)(a-b) = a(a-b) + b(a-b) = a^2 - ab + ab -b^2 = a^2 - b^2
ok
:) thankyou
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