tentang vektor, pliss kak bantuin

p = 4i - 2j + 5k = (4, -2, 5)
q = 6i + 8j - 12k = (6, 8, -12)

a) |p|
= √(4)² + (-2)² + (5)²
= √16 + 4 + 25
= √45
= 3√5

b) |q|
= √(6)² + (8)² + (-12)²
= √36 + 64 + 144
= √224
= 4√14

c) |p + q|
= √(4 + 6)² + (-2 + 8)² + (5 - 12)²
= √(10)² + (6)² + (-7)²
= √100 + 36 + 49
= √185

d) |p - q|
= √(4 - 6)² + (-2 - 8)² + (5 + 12)²
= √(-2)² + (-10)² + (17)²
= √4 + 100 + 289
= √393

e) |p + q| ≠ |p| + |q|