$${{\mathtt{2}}}^{{\mathtt{3}}}{\mathtt{\,\times\,}}{{\mathtt{3}}}^{{\mathtt{4}}} = {\mathtt{648}}$$

2^3 can be rewritten as 2^2 * 2^1, one 2 stays in the radical.

You are watching: Square root of 648 in radical form

3^4 can be taken completely taken out of the radical as 9.

Which becomes 2*9√2 or 18*√2


Guest Jan 16, 2015
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