For each algebraic expression listed below, write (a) its degree, (b) whether it is a monomial, binomial or trinomial, and (c) its classification by degree (constant, linear, quadratic, cubic, etc.).
(a) 6x5−4x3+2x
(b) 21x4+3
(c) 7x2−9x+1
(d) 8x7
(e) 3x3+0x2−5
a. (i) Complete the required classification for each expression (a)–(e).
b. (ii) From the expressions above, list all those that are binomials.