Philip P. answered • 10/08/18

Effective and Patient Math Tutor

P(x) = x

^{4}− 3x^{3}+ 2x^{2}P(x) = x²(x² - 3x + 2)

P(x) = x·x(x-1)(x-2)

Zeros are at x = 0, 0, 1, 2

P(x) is degree 4, so it will have four roots. You only entered three which is probably why it came up as wrong. The x² term has a multiplicity of 2, so it counts twice.