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intro to polynomials

a polynomial is a sum of terms of the form

a * x

a is a real number exponent on x is a whole number

7.2x^3 -18x^7 -4.1

write polynomials in descending order by degree ( degree is sum of the exponents on the variable factors )

18x^7 has highest degree

-18x^7 +7.2x^3 -4.1

degree 7 polynomial coefficient on the leading term is called the leading coefficient, so the leading coefficient is -18