2i/4-8i * (4+8i)/(4+8i)

then i multiplied the top and bottom and got

8i/ 4^2 + 16i/8^2

8/80 + 16i/80

reduce to
4/5 + 2i

is this correct

  1. 👍 0
  2. 👎 0
  3. 👁 73
asked by sarah
  1. You started off ok, but then ...

    2i/(4-8i) * (4+8i)/(4+8i)
    = (8i + 16i^2)/(16 - 64i^2)
    = (8i + 16i^2)/(80)
    = (i - 2)/10
    i/10 - 1/5

    1. 👍 0
    2. 👎 0
    posted by Reiny

Respond to this Question

First Name

Your Response

Similar Questions

  1. physics

    An 11.4 kg block of metal is suspended from a scale and immersed in water, as in the figure below. The dimensions of the block are 12.0 cm multiplied by 11.1 cm multiplied by 11.1 cm. The 12.0 cm dimension is vertical, and the top

    asked by PJ on April 17, 2012
  2. Luke, Math , algebra

    Sorry it was a type. For the problem multiply and write answer in simplest form. 4/12 multiplied by 10/4 My answer: FOr what i understood i only got to the flipping step which is 4/12 multiplied by 4/10 now what step do i do. you

    asked by jasmine20 on December 16, 2006
  3. physics

    A 2.1 multiplied by 103-kg car starts from rest at the top of a 5.8-m-long driveway that is inclined at 22° with the horizontal. If an average friction force of 4.0 multiplied by 103 N impedes the motion, find the speed of the

    asked by Anonymous on September 30, 2013
  4. math,algebra,help

    Okay now i need explanation how to do these types of problems. Directions: Divide Problem: (7x^5y^5-21x^4y^4+14x^3y^3)/(7x^3y^3) Realize that you have 7x^3y^3 on the bottom. Now in order to get rid of that, you want to have the

    asked by Jasmine20 on January 24, 2007
  5. Stats

    A sociology professor assigns letter grades on a test according to the following scheme. A: Top 14% of scores B: scores below the top 14% and above the bottom 55% C: scores below the top 45% and above the bottom 17% D: scores

    asked by Benjamin on October 14, 2017
  6. math,algebra

    Directions:Multiply (-1/2)(-3/8) mY ANSWER : .1875 Now how do i turn this into a fraction. numerator multiplied: 3 denominator multiplied 16 3/16 How do you get to that answer because not every single one would be multiplied by

    asked by jasmine20 on December 12, 2006
  7. math,algebra,help

    can someone show me how to solve this: Simplify 3 --- + 1 x-5 ----------- 4 1 minus ---- x -5 that did n't look right...typo... here it is its a fraction on top of the other so the top is fine.the bottom should read one minus

    asked by jasort20 on March 13, 2007
  8. drbob222, math ,algebra

    can you explain to me the following problem , ms.sue and others are trying to help me but they are making me more confuse. Is there any short cuts to the following problem. Directions:multiply and write the answer in simplest

    asked by jasmine20 on December 16, 2006
  9. Math

    A fireman used a ladder with 56 rungs. The rungs are 14 inches apart and 1.5 inches thick. What is the distance from the bottom of the lowest rung to the top of the highest rung? Check if I solved correctly please. I multiplied

    asked by Spencer on September 19, 2015
  10. Statistics

    I'm stumped on this question. A teacher informs her history class that a test is very difficult, but the grades would be curved. Scores for the test are normally distributed with a mean of 25 and a standard deviation of 5. If the

    asked by Norilyn on March 15, 2011
  11. Math

    Really stuck on this question not sure where im going wrong a trapezium with top and bottom sides paralell. With a diagonal line running from the top left to the bootom right hand corner splitting the trapez into two triangles.

    asked by Evie on February 3, 2014

More Similar Questions