SOLUTION: {{{ sqrt( 20 ) }}} + {{{ 2sqrt( 45 ) }}}

Algebra ->  Square-cubic-other-roots -> SOLUTION: {{{ sqrt( 20 ) }}} + {{{ 2sqrt( 45 ) }}}      Log On


   

Question 97612: +sqrt%28+20+%29+ + +2sqrt%28+45+%29+
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
sqrt( 20 ) + 2sqrt( 45 )
= sqrt(4*5) + 2sqrt(9*5)
= 2sqrt(5) = 2*3sqrt(5)
= 2sqrt(5 + 6sqrt(5)
= 8sqrt(5
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Cheers,
Stan H.