Under tree plantation programme students of class VIII and IX planted (3x2 -4x-4) trees in school

Under tree plantation programme students of class VIII and IX planted (3x2 -4x-4) trees in school.
(a) If number of students in those classes are (x-2) then find out number of trees planted by each student. (Assuming each student planted equal number of trees).
(b) What values of students are exhibited here?

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