Answer:
Monomial expression: a single, non-zero term, with non-negative integer exponents of the variables.
Binomial expression: 2 non-zero unlike terms, joined using arithmetic operators.
Trinomial expression: 3 non-zero unlike terms, joined using arithmetic operators.
Degree: The number of the highest power.
Leading Coefficient: The number or quantity placed before the variable of the term with the highest power.
[tex]3x^2+4x+1[/tex]
(Quadratic) Trinomial, degree 2 quadratic, leading coefficient 3
[tex]2x^3[/tex]
Monomial, degree 3 cubic, leading coefficient 2
[tex]x+5[/tex]
Binomial, degree 1 linear, leading coefficient 1