There are two ways to work this out: normal variables or using "imaginary" numbers.
Normal variables:
![(7+2i)(3-i)\\(7*3)+[7*(-i)]+(3*2i)+[2i*(-i)]\\21-7i+6i-2i^{2}\\\\21-i-2i^{2}](https://tex.z-dn.net/?f=%20%287%2B2i%29%283-i%29%5C%5C%287%2A3%29%2B%5B7%2A%28-i%29%5D%2B%283%2A2i%29%2B%5B2i%2A%28-i%29%5D%5C%5C21-7i%2B6i-2i%5E%7B2%7D%5C%5C%5C%5C21-i-2i%5E%7B2%7D)
Imaginary numbers:
Using the result from earlier:
Now since
, then the expression becomes:
Answer:
If two quantities are proportional, then they have a constant ratio. If the ratio is not constant, the two quantities are said to be non-proportional.
Yes! If there one one negative and one positive then the answer would've been negative!
Answer:
<u>18 shots</u>
Step-by-step explanation:
By criss cross method
100% -> 20 shots
90% - >?
Hope this helps...
Answer: OPTION C.
Step-by-step explanation:
Given the functions:
We need to divide f(x) by g(x) in order to find 
÷
. Then:
÷
Factorizing and simplifying, we get:
÷
÷
