M² - 12m + 20
m² ⇒ m * m
20 ⇒ - 10 * -2
(m - 10)(m - 2)
m(m - 2) - 10(m-2)
m² - 2m - 10m + 20
m² - 12m + 20
m - 10 = 0
m = 10
m - 2 = 0
m = 2
Answer:

Decimal Form:

Step-by-step explanation:

Remove Parentheses: 

Multiply the numbers: 

Divide both sides by: 

Simplify:

Hope I helped. If so, may I get brainliest and a thanks?
Thank you, have a good day! =)
We divide the total sum of the angles by 20

=18 sides
1/1 because if you’ve already take one or orange out of the box you would only have one left to select two from the same box. you started with 2/2 and took one out put 1/1.