Let v=-7i+8j and w=-i-9j find 6w+6v?
回答 (2)
2016-11-06 4:21 am
Start by substitution: 6(-i - 9j) + 6(-7i+8j), then multiply the first term by six and the second term by 6. Like so: -6i - 54j + -42i + 48j then simplify -48i - 6j
2016-11-06 5:08 pm
- 6i - 54j - 42i + 48j
- 48i - 6 j
- 48i - 6 j
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