If a is 3i-4j and b = -i-4j calculate a + b and |a +b|
Answers
Answered by
5
Answer:
2i - 8j & √68
Step-by-step explanation:
a = 3i - 4j
b = -i - 4j
a + b = 3i - 4j - i - 4j
= 2i - 8j
|a + b| = √(2² + 8²)
= √(4 + 64)
= √68
Similar questions