Question

If a=3i+9j and b=4i-6j, find 5a-3b Write your answer in the form i + j.

Answer 1

3i + 63j

Explanation:

Step 1: Replace the variables with the given statements

5(3i+9j) - 3(4i-6j)

Step 2: Distribute

15i + 45j -12i + 18j

Step 3: Combine like terms

3i + 63j