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Math Help - three problems NEED URGENT HELP

  1. #1
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    Question three problems NEED URGENT HELP

    please if anyone could answer these:

    #1: complex number in stranded form:
    1+3i/3+4i


    #2: complete the square x^2-8x+4=0

    #3: find the absolute value of (2-3i)
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  2. #2
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by keane View Post
    please if anyone could answer these:

    #1: complex number in stranded form:
    1+3i/3+4i
    multiply by the conjugate of the denominator over itself. that is, to get \frac {a + ib}{c + id} in standard form, multiply by \frac {c - id}{c - id} and simplify

    #2: complete the square x^2-8x+4=0
    see here

    #3: find the absolute value of (2-3i)
    |a + ib| = \sqrt{a^2 + b^2}
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