Answer
a)True
b)True
c)False
d)True
Work Step by Step
a)True, if x is greater then 2 it is also greater then 1
b)True, because if its greater then x, x^2 would be greater then 4
c)False, Counterexample if x=-3 x^2=9 which is greater then 4, but -3 is not greater then 2
d)True, similar to b however x is now |x| which means x is always positve
