Inverse 3 is the symbol of polynomial sum, and 3 is the mathematical symbol ∑, which is commonly used in mathematics. This symbol is mainly used in junior and middle schools. We studied a lot of mathematical symbols in junior high school, and mainly studied plane geometry and solid geometry in senior high school.

How to find the sum of polynomials;

According to the binomial theorem, the expansion of polynomial to the nth power: if the nth power of a number (n is an integer greater than 1) equals A, then this number is called the nth root of A. When n is odd, this number is the odd root of A.

When n is an even number, this number is the even root of a, and the operation of finding the n-th square root of a number is called opening n power, a is called root number, and n is called root index.

There is no theorem that is valid only for narrow polynomials but not for monomials. When 0 is a polynomial, the degree is defined as negative infinity (or 0). Monomial and polynomial are collectively called algebraic expressions.