like addition - you add such and such and keep exponents.. stuff like that
A polynomial looks like this:
Polynomial comes from poly- (meaning "many") and -nomial (in this case meaning "term") ... so it says "many terms"
A polynomial can have:
that can be combined using addition, subtraction, multiplication and division ...
... except ...
A polynomial can have constants, variables and exponents,
but never division by a variable.
(Yes, even "5" is a polynomial, one term is allowed, and it can even be just a constant!)
And these are not polynomials
But these are allowed:
There are special names for polynomials with 1, 2 or 3 terms:
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