Question

The cubic polynomial formed by the zeroes -1, 1 and 2 is _____________​

Answer 1

Answer:

${x}^{3} - 2 {x}^{2} - x + 2 = 0$

Step-by-step explanation:

$(x + 1)(x - 1)(x - 2) = 0 \\ \\ (x + 1)( {x}^{2} - 3x + 2) = 0 \\ \\ {x}^{3} - 3 {x}^{2} + 2x + {x}^{2} - 3x + 2 = 0 \\ \\ {x}^{3} - 2 {x}^{2} - x + 2 = 0$