Posted by Mike on Thursday, May 19, 2011 at 3:49pm.
sqrt(32)=sqrt(2)*sqrt(16)=sqrt(2)*4
sqrt(50)=sqrt(2)*sqrt(25)=sqrt(2)*5
sqrt(128)=sqrt(2)*sqrt(64)=sqrt(2)*8
sqrt(32)-sqrt(50)+sqrt(128)=
sqrt(2)*4-sqrt(2)*5+sqrt(2)*8=
sqrt(2)*(4-5+8)=
sqrt(2)*7
OR
7*sqrt(2)
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