Which one of the following is not a surd?
As we know
surd is a number in which we cant remove its square root(cube root …etc)
A.
= 
= 2 is not surd
B. 
cant be simplified hence surd
C.
cannot be simplified hence surd
cannot be simplified hence surd
Hence A is the answer.
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, find the values of 
is
is equal to