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Simplify (8j3 – 5j2 – 5) – (6j3 – 12j2 + 8j – 7) Answers A.2j3 – 17j2 + 8j – 12 B. 2j3 + 7j2 + 8j – 12 C.2j3 – 17j2 – 8j + 2 D.2j3 + 7j2 – 8j + 2
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5 votes
Simplify (8j3 – 5j2 – 5) – (6j3 – 12j2 + 8j – 7)

Answers
A.2j3 – 17j2 + 8j – 12

B. 2j3 + 7j2 + 8j – 12

C.2j3 – 17j2 – 8j + 2

D.2j3 + 7j2 – 8j + 2

User Markus Weber
by
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2 Answers

6 votes

D.2j3 + 7j2 – 8j + 2

User Anirudh Ramanathan
by
7.8k points
3 votes
(8j3 - 5j2 - 5) - (6j3 - 12j2 + 8j - 7) =
(8j3 - 6j3) - (5j2 - 12j2) - 8j - (5-7) =
2j3 - (-7j2) - 8j - (-2) =
2j3 + 7j2 - 8j + 2

The correct answer is D. 2j3 + 7j2 - 8j + 2
User Ecbrodie
by
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