Question 423202
It follows that 2 must be a double root. A useful property of polynomials is that if r is a root, then x-r is a factor of the polynomial. We can express the polynomial in the form {{{C(x-2)^2 = C(x^2 - 4x + 4) = Cx^2 - 4Cx + 4C}}} where C is a nonzero constant.