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23-11-2016
Mathematics

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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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Greenleafable Greenleafable

01-12-2016

(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

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