SOLUTION: number one: -4-4i/-3i number two: 6/8i number three: 7/9i number four: -7/7i number five: 8i/-2+9i

Algebra ->  Complex Numbers Imaginary Numbers Solvers and Lesson -> SOLUTION: number one: -4-4i/-3i number two: 6/8i number three: 7/9i number four: -7/7i number five: 8i/-2+9i      Log On


   

Question 1096719: number one: -4-4i/-3i
number two: 6/8i
number three: 7/9i
number four: -7/7i
number five: 8i/-2+9i
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
number one: -4-4i/-3i
number two: 6/8i
number three: 7/9i
number four: -7/7i
number five: 8i/-2+9i
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Multiply NUM and DEN by the conjugate of the DEN -2-9i
8i%2A%28-2-9i%29%2F%28%28-2%2B9i%29%2A%28-2-91%29%29
= %28-16i-72i%5E2%29%2F%284-36i%5E2%29%29
= %28-16i%2B72%29%2F%284%2B36%29%29
= %28-16i%2B72%29%2F40
= %289-2i%29%2F5
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1 - 4 are much simpler