Which polynomial, when added to the polynomial 5x2–3x–9, is equivalent to x^2–5x+6?

2 answers

5x^2–3x–9 + f(x) = x^2–5x+6
f(x) = x^2–5x+6 - (5x^2–3x–9)
= .....
5x^2–3x–9 + f(x) = x^2–5x+6
f(x) = x^2–5x+6 - (5x^2–3x–9)
= −4x^2−2x+15