brainly won't let me type my answer out so i'll just put it in the comments, sorry if it's inconvenient.
The simplest polynomial function for it is 1- i
Answer:

Step-by-step explanation:
First, distribute the -2 to the rest of the parenthesis, following PEMDAS.

Then, add -6a to both sides.

Now, you can divide both sides by 2 to isolate b.

Divide to simplify.

Answer:
x=5 is what i got from a calculaotr
Step-by-step explanation:
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I think Lin is trying to convince Andre that all circles are similar by saying all the circles are similar with math.