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4 June, 13:36

Simplify the expression below as Mich as possible

(6+3i) + (8+4i) - (1+4i)

A. 13+11i

B. 15+3i

C. 13+3i

D. 15+11i

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  1. 4 June, 13:47
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    Answer: c. 13 + 3i

    (6 + 3i) + (8 + 4i) - (1 + 4i)

    (6 + 3i) + (8 + 4i)

    (since you're adding, there's no need to change signs, just add like terms)

    6 + 8 = 14 3i + 4i = 7i

    7i + 14

    (7i + 14) - (1 + 4i)

    (since you're subtracting, you have to change signs for the second binomial and then add like terms)

    7i + 14 - 1 - 4i

    7i - 4i = 3i 14 - 1 = 13

    3i + 13
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