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Nomor 15Nomor 16
Nomor 17
Nomor 18
√6 (2√3 - √32)
= √6 (2√3 - 4√2)
= 2√18 - 4√12 = 6√2 - 8√3
Nomor 19
(√6 + √3)(2√3 - √6)
= 6√2 - 6 + 6 - 3√2 = 3√2
Nomor 20
(√5 + √3)²
= 5 + 2√15 + 3 = 8 + 2√15
Nomor 21
(4a√3 - 3)²
= 48a² - 2(4a√3)(3) + 9 = 48a² - 12a√3 + 9
Nomor 23
Nomor 24
Nomor 1.b
Nomor 3.a
Nomor 3.d
5√12 + 4√75
= 10√3 + 20√3 = 30√3
Nomor 3.f
6√20 + 2√75 - 4√5 + 3√48
= 12√5 + 10√3 - 4√5 + 12√3 = 22√3 + 8√5