I need helpwith these 3 questions please!
1. radical 10 (11+ radical 5)
2. 7 over 10i
3. radical 49 over (3+4i)-(2-5i)
Stacey Warren - Expert brainly.com
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What are the questions here? I'm not sure I understand. Do you need to simplify? Rationalize?
yes simplify. im sorry
1. 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:
3.i dont know