Add the following expressions:-
A) P2
-7pq-q
2 and -3p2
-2pq +7q2.
please tell correct answer only there is my exam
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1 .Contrary to popular belief, machines do not increase the amount of work that is done. They just change how the work is done. Machines make work easier by increasing the amount of force that is applied, increasing the distance over which the force is applied, or changing the direction in which the force is applied.
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