Teacher asked a question to the students in the class : Find the difference
of squares of 55 and 45. Abhinav used an identity and solved the question
immediately
a) Which identity did Abhinav use?
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" The velocity of an object is the rate of change of its position with respect to a frame of reference, and is a function of time. Velocity is equivalent to a specification of an object's speed and direction of motion (e.g. 60 km/h to the north). "
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I think this is your answer
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