Page 6 - Persamaan Nilai Mutlak
P. 6
Contoh 1
Diketahui a = 5 dan b = –2, maka:
• |ab| = |5 × (–2)| = |–10| = –(–10) = 10
• |a||b| = |5| × |–2| = 5 × 2 = 10
• |a + b| = |5 + (–2)| = |3| = 3
• |a| + |b| = |5| + |–2| = 5 + 2 = 7
• |a² – b²| = |5² – (–2)²| = |25 – 4| = |21| = 21
• |2b – 4| = |2 × (–2) – 4| = |–4 – 4| = |–8| = –(–8) = 8
