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26-06-2020
Mathematics

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

Respuesta :

26-06-2020

Answer:

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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