# Help me solve the math?

Vectors are given: For these vectors, calculate a-2b

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- Engr. RonaldLv 71 month ago
given

a = - 3i + 2j

b = - i + 2j

a - 2b

=- 3i + 2j - 2(- i + 2j)

= - 3i + 2j + 2i - 4j

=- i - 2j Answer//

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- RaymondLv 71 month ago
It is simply an ordered subtraction (the "i" components are done in one operation, the "j" in a separate operation).

a = -3i + 2j

b = -i + 2j

2b = -2i + 4j

a - 2b = -3i + 2j - (-2i + 4j)

careful with signs

a - 2b = -3i + 2j + 2i - 4j

do the "i" separately from the "j"

a - 2b = -3i + 2i + 2j - 4j

a - 2b = -i - 2j

- Jhon1 month agoReport
Thanks))

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