whats x to the 3rd squared

(x³)²  =  (x³)·(x³)  =  (x·x·x)·(x·x·x)  =  x^6

The fastest way to find the value of an exponent to an exponent is to multiply the two exponents together:  

        3 x 2  =  6.    --->   (x³)²  =  x³·²  =  x^6