Question 762710
{{{ 3*sqrt(2) + 5*sqrt(2) }}}
You have to see that the thing to factor out
is {{{ sqrt(2) }}}
{{{ sqrt(2)*( 3 + 5 ) }}}
{{{ 8*sqrt(2) }}}
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If it's confusing, just say {{{ x = sqrt(2) }}}
Then you have:
{{{ 3x + 5x = 8x }}}
Now put the {{{ sqrt(2) }}} back in