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=> 4√7 x 3√(7 x 4)
=> 4√7 x 3√7 x 2
=> 24 x 7 = 168 (Sudah sederhana)
2.) 5(3√5 + √50)
=> 5(3√5 + √(25 x 2))
=> 5(3√5 + 5√2) (Sudah sederhana)
=> 15√5 + 25√2
3.) (√5 + √6)(√5 + √6)
=> 5 + √30 + √30 + 6
=> 11 + 2√30 (Sudah sederhana)
4.) (√28 - √12)(2√7 + 2√3)
=> (2√7 - 2√3)(2√7 + 2√3)
=> 28 + 4√21 - 4√21 - 24
=> 28 - 24 = 4 (Sudah sederhana)
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