Question 252919
write each equation below in simplest radical form. show your steps. 
7. square root of 4x to the 8th power
{{{sqrt(4x)^8}}}
we cab rewrite using fractional exponents as
{{{((4x)^(1/2))^8}}}
this becomes
{{{(4x)^4}}}
{{{256x^4}}}
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8. square root of 28
{{{sqrt(28)}}} = {{{sqrt(4*7)}}} = {{{sqrt(4) * sqrt(7)}}} = 2* sqrt(7)
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9. square root of 27a cubed 
{{{sqrt(27a^3)}}} = {{{sqrt(27)*sqrt(a^3)}}} = {{{3sqrt(3)*asqrt(a)}}} = 3asqrt(3a