Answer:
Expand it.
(1+2i)^3 is equal to (1+2i)(1+2i)(1+2i).
Multiply everything out (being sure to multiply <em>every</em> term. (1+2i) * (1+2i) = 1+2i+2i+4i^2.
i is the square root of negative one, so i^2 is just -1. 1+2i+2i-4 is what you get from the first two, so now simplify that:
1-4 + 2i+2i = (-3+4i) and now multiply that by (1+2i):
(-3+4i) * (1+2i) = -3 - 6i +4i +8i^2.
Simplify again, and the answer is: -11-2i
Step-by-step explanation:
I hope this helps - really my only tip is don't spend time thinking about what i is, that just hurts your brain. Just remember that i^2 is equal to negative one, and treat it like regular multiplication and you will be fine.
Answer:
71/1000 as a decimal you have to divide numerator by the denominator of the fraction.
We divide now 71 by 1000 what we write down as 71/1000 and we get 0.071
Step-by-step explanation:
Answer:
add 15+15+4 and you will have the total ft
Answer:
√2⋅3+3=3
√9=3
please mark brainly if I am right
3=3
Step-by-step explanation: