Answer:

Step-by-step explanation:
You need to subtract the coefficients to get the answer.
Let's look at the equation...

The coefficient is 3 and 1
So, you do 3-1
You get 2
So...
2(3x+4) you multiply 2 times 3x and 2 times 4 which gives you 6x+8
No it's as n example of a equality
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first
second
and fifth are true
Basically the square root of -1 is i. From that you should be able to deduce the answers.