Answer:
7b-c²
Step-by-step explanation:
7times b is 7b reduced by the square of c means minus c²
Hello there,
I hope you and your family are staying safe and healthy during this winter season.

We need to use the Quadratic Formula*
, 
Thus, given the problem:

So now we just need to plug them in the Quadratic Formula*
, 
As you can see, it is a mess right now. Therefore, we need to simplify it
, 
Now that's get us to the final solution:
, 
It is my pleasure to help students like you! If you have additional questions, please let me know.
Take care!
~Garebear
The second one
Pls mark brainliest
Answer: 80 and 100
Step-by-step explanation:
180/2=90
90+10=100
90-10=80