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23 November, 13:58

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

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  1. 23 November, 17:15
    0
    3i + 63j

    Step-by-step 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
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