2d column number terms 1st name using degree 2x² - no sighs + or - so it is monomial x² ---quadratic that divides like(a+b),or (a-b) only multiplication
-2 -no sighs + or - so it is monomial no x, constant 3x - 9 "-" divides 2 monomials binomial x, linear -x²- 3x + 9 trinomial x²,so quadratic