x = ? 42 = x squared minus x
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It is the same as xsquared+9x+18 and when factored: (x+3)(x+6)
A 7th degree polynomial.
Depending on the missing operational sign, that would be 2(x plus or minus 8)
-9
A zero of a polynomial function - or of any function, for that matter - is a value of the independent variable (often called "x") for which the function evaluates to zero. In other words, a solution to the equation P(x) = 0. For example, if your polynomial is x2 - x, the corresponding equation is x2 - x = 0. Solutions to this equation - and thus, zeros to the polynomial - are x = 0, and x = 1.