3 years ago

PRE CAL

Mathematics

1 answer:

dexar [7]3 years ago

4 0

Answer:

7i - 27j

Step-by-step explanation:

<h3>Given</h3>

a = 2i + 9j, b = –4i + 5j, c = i – 3j, d = 14j

(a – b) – (2d – c)

<h3>Solution</h3>

(a – b) – (2d – c) =
2i + 9j - (–4i + 5j) - (2(14j) - (i – 3j)) =
2i + 9j + 4i - 5j - 28j + i - 3j =
(2 + 4 + 1)i + (9 - 5 - 28 - 3)j =
7i + (-27)j =
7i - 27j

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