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atas dan bawah sama" dikali √5 + √2 agar nanti akarnya tidak dibawah
jadi 6 ( √5 + √2 ) / ( 5 - 2 )
6 ( √5 + √2 ) / 3
2 ( √5 + √2 )
2√5 + 2√2
2. √10 / (4 + √5)
ruas atas dan bawah sama" dikali ( 4 - √5 )
√10 ( 4 - √5 ) / ( 16 - 5 )
√10 ( 4 - √5 ) / 11
(4√10 - √50 ) / 11
6/(√5-√2)
=
{ 6/(√5-√2) } x { (√5+√2) / (√5+√2) }
=
(6√5+6√2) / (√25+√10-√10-√4)
=
(6√5+6√2) / (√25-√4)
=
(6√5+6√2) / (5-2)
=
(6√5+6√2) / 3
=
(6√5)/3+(6√2)/3
=2√5 + 2√2