Jawabanmu

Jawaban paling cerdas!
2014-08-19T20:25:17+07:00
=√20 + √125 + 2√28 - 4√63
=√4.5 + √25.5 + 2√4.7 - 4√9.7
=(2√5 + 5√5 )+ (2.2√7 - 4.3√7)
=(2√5 + 5√5 ) +(4√7 - 12√7)
= 7√5 + (-8√7)
=7√5 - 8√7
2 5 2