What is the value of x?

A.15 start root 3 end root
B.Start Fraction 15 over 2 End Fraction
C.5 start root 3 end root
D.Start Fraction 15 Start Root 2 End Root over 2 End Fraction

What is the value of x A15 start root 3 end root BStart Fraction 15 over 2 End Fraction C5 start root 3 end root DStart Fraction 15 Start Root 2 End Root over 2 class=