How do I answer number 3?

Your example: 5+6a+11b

Term: Each expression is made up of terms. A term can be a signed number, a variable, or a constant multiplied by a variable or variables.

Your example: 5, 6a, 11b

Factor: Something which is multiplied by something else. A factor can be a number, variable, term, or a longer expression.

Your example: 5, 6, a, 11, b

Coefficient: The numerical factor of a multiplication expression that contains a variable.

Your example: 6, 11

Constant: A number that cannot change its value.

Your example: 5

factors are 5, 6, a, 11, b

-Credit to  frika

constants mean the stopped points or the points on a graph that nothing is changing, hope this

step-by-step explanation:

225x²+4=0

225x²=0-4

225x²=-4

x²=-4/225

x=±√-4/225