Me ..

identify the following polynomial as a trinomial, binomial, or monomial.

2 + 4a - a4
trinomial
binomial
monomial
give the degree.

identify the following polynomial as a trinomial, binomial, or monomial.
39x3 - 1
trinomial
binomial
monomia
give the degree

identify the following polynomial as a trinomial, binomial, or monomial.
3a2

trinomial
binomial
monomial

find the value of the polynomial x2 - 2x + 1 when x is 2.

Just general definitons:

a TRInomial has 3 terms (tri means three)
a BInomial has 2 terms (bi means two)
a MONOmial has 1 term (mono means one)

the degree is the highest exponent found in the algebraic expression

so they should be pretty easy to solve with that information, but just in case:

1. trinomial, degree of 4
2. binomial, degree of 3
3. monomial, degree of 2

for the final question, all you have to do is plug in 2 for x, so

(2)^2 - 2(2) + 1

4 - 4 + 1

so the answer is 1