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a) √2 + 3√2 + 5√2
b) 5√3 + 3√3 − √3
c) 8√3 + 6 √2 + 12√3 − 4√2
Pembahasana
a.) √2 + 3√2 + 5√2
= (1 + 3 + 5)√2
= 9√2
b.) 5√3 + 3√3 − √3
= (5 + 3 − 1)√3
= 7√3
c) 8√3 + 6 √2 + 12√3 − 4√2
= 8√3 + 12√3 + 6√2 − 4√2
= (8 + 12)√3 + (4 − 2)√2 = 20√3 + 2√2
2.Hitung dan sederhanakan:
a) √2 + √4 + √8 + √16
b) √3 + √9 + √27
c) 2√2 + 2√8 + 2√32
Pembahasana
√2 + √4 + √8 + √16
= √2 + √4 + √4 √ 2 + √16
= √2 + 2+ 2√2 + 4
= 2 + 4 + √2 + 2√2
= 6 + 3√2
b) √3 + √9 + √27
= √3 + √9 + √9 √3
= √3 + 3 + 3√3
= 3 + 4√3
c) 2√2 + 2√8 + 2√32
= 2√2 + 2√4 √2 + 2√16 √2
= 2√2 +2 (2)√2 + 2(4)√2
= 2√2 + 4√2 + 8√2 = 14√2
√900
√39
√75
√399.424