Question 142722
example:



{{{6sqrt(7)-2sqrt(28)}}}

Change {{{28}}} to {{{4*7}}}

{{{6sqrt(7)-2sqrt(4*7)}}}

{{{6sqrt(7)-2sqrt(4)sqrt(7)}}}

{{{6sqrt(7)-2(2)sqrt(7)}}}

{{{6sqrt(7)-4sqrt(7)}}}

{{{2sqrt(7)}}}

and 

{{{sqrt(32)*sqrt(144)}}}

Write {{{32}}} as {{{16*2}}}

and write {{{144}}} as {{{12^2}}}

{{{sqrt(16*2)*sqrt(12^2)}}}

{{{sqrt(16)sqrt(2)*12}}}

{{{4sqrt(2)*12}}}

{{{48sqrt(2)}}}

Edwin