Polynomial
In algebra A polynomial can have constants,variables,exponents
https://www.mathsisfun.com/algebra/polynomials.html
Degree of Polyunomial
The Degree (for a polynomial with one variable, like x) is: the largest exponent of that variable. https://www.mathsisfun.com/algebra/degree-expression.html
Coefficient
A coefficient refers to a number or quantity placed with a variable. It is usually an integer that is multiplied by the variable and written next to it.
https://www.cuemath.com/algebra/coefficient/