(3/4 + 3/4i)(2/5 + 1/5i)

The answer in the back of the book is 3/20 + 9/20i    

I changed the numerator to 20 and got (15/20 + 8/20)(15/20i + 4/20i). I am not sure where I went wrong on this.

Thank you for your help!
in Algebra 1 Answers by

Your answer

Your name to display (optional):
Privacy: Your email address will only be used for sending these notifications.
Anti-spam verification:
To avoid this verification in future, please log in or register.

1 Answer

(3/4)(2/5)+(3/4)(1/5)i^2+i((3/4)(2/5)+(3/4)(1/5))=3/10-3/20+(3/10+3/20)i=3/20+(9/20)i.

Or

(3/4)(1+i)(1/5)(2+i)=(3/20)(2+3i-1)=(3/20)(1+3i)=3/20+(9/20)i.
by Top Rated User (1.2m points)

Related questions

1 answer
Simplify (2-4i)(3+5i)
asked Mar 1, 2013 in Calculus Answers by anonymous | 816 views
1 answer
How to solve. (9-4i) - (2 + 5i)
asked Mar 15, 2012 in Algebra 1 Answers by anonymous | 1.5k views
1 answer
(6+4i)+(3-2i)
asked Jan 21, 2019 in Algebra 2 Answers by Tgf | 942 views
1 answer
Solve the following equation: Z^4=3-4i
asked Oct 30, 2017 in Other Math Topics by Complex numbers | 558 views
1 answer
if u=-4i+6J and v=-i+5j and w=-3i+9j find proj u
asked Nov 18, 2013 in Calculus Answers by anonymous | 675 views
1 answer
a+bi=-9+4i
asked Oct 13, 2013 in Algebra 2 Answers by math | 2.5k views
1 answer
if U = I + 3j - 2k and V = 4i - 2j - 4k are vectors, find U.V
asked May 23, 2013 in Geometry Answers by anonymous | 1.2k views
1 answer
(12-9i)/4i
asked May 8, 2013 in Algebra 2 Answers by anonymous | 942 views
1 answer
p(x)=x^3+7x^2+31x+25 is -3-4i
asked May 3, 2013 in Calculus Answers by anonymous | 664 views
1 answer
Rationalize the denominator 3-4i/8+3i
asked Apr 3, 2013 in Algebra 2 Answers by anonymous | 861 views
1 answer
z=2-4i compute z^10
asked Apr 1, 2013 in Algebra 2 Answers by anonymous | 657 views
Welcome to MathHomeworkAnswers.org, where students, teachers and math enthusiasts can ask and answer any math question. Get help and answers to any math problem including algebra, trigonometry, geometry, calculus, trigonometry, fractions, solving expression, simplifying expressions and more. Get answers to math questions. Help is always 100% free!

Most popular questions within the last 3000 days

  1. 50+50-25X0+2+2= (19)
  2. it takes 10 road workers 5 days to complete a road repair when working 2 hours a day.Working at the same pace,how many days will it take 2 people working 5 hours a day to finish it? (3)
  3. Solve 15 -1(12÷4+1)? (4)
  4. 8:4(5+2) (3)
  5. How can i represent 1/3; 3/3; 7/3; 10/3 and 15/3 on a number line? (1)

Most popular tags

87,516 questions
100,279 answers
2,420 comments
733,037 users