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anonymous
 4 years ago
I need helpwith these 3 questions please!
1. radical 10 (11+ radical 5)
2. 7 over 10i
3. radical 49 over (3+4i)(25i)
Please help!
anonymous
 4 years ago
I need helpwith these 3 questions please! 1. radical 10 (11+ radical 5) 2. 7 over 10i 3. radical 49 over (3+4i)(25i) Please help!

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anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0What are the questions here? I'm not sure I understand. Do you need to simplify? Rationalize?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0yes simplify. im sorry

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.01. 10√(1/5)  √45  12√(5/9) 10√(1/5)  √9√5 (12/3)√5 10√(1/5)  3√5  4√5 10√(1/5)  7√5 2. You have to know that each numbers has factors 10 has the factors 10 and 1 and 5 and 2 12 has factors 12 and 1, 6 and 2 and 4 and 3 You simplify by doing the same to numerator (top number) and denomiator (bottom number). The only common factors are 1 and 2. Since 1 leaves you with the same expression you take the higher number 2 to get 5/6. If you knew multiplication tables you would see the answer inherently. I am not sure those tables are taught in schools anymore. They are here: http://www.mathsisfun.com/timestable.htm … 3.i dont know

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0\[\frac{7}{10i}=\frac{7}{10i}\times \frac{i}{i}=\frac{7i}{10}=\frac{7i}{10}\]

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0#3, first of \[\sqrt{49}=7\] and \[(3+4i)(25i)=1i\]so start with \[\frac{7}{1i}\]

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0then \[\frac{7}{1i}=\frac{7}{1i}\times \frac{1+i}{1+i}=\frac{7(1+i)}{2}\]

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0last line because \[(a+bi)(abi)=a^2+b^2\]

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0then standard form looks like \[\frac{7}{2}+\frac{7}{2}i\]

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0the answers to the first question is A.11 radical 10 + 5 radical 2 B. 5 radical 2 + 11i radical 10 C. 5 radical 2  11i radical 10 D. 11 radical 10 + 5 radical 2

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0yeah, they were all wrong..

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0thanks for your effort though
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