Question

CALCULE : (x - 1) . (x³+ 2x² -x +6)=

Answer 1

(x-1).($x^{3}$ +2$x^{2}$ -x +6) =
    =$x^{4}$ +2$x^{3}$ - $x^{2}$+6x -$x^{3}$ -2$x^{2}$ +x -6 = $x^{4}$ +$x^{3}$ -3$x^{2}$ + 7x-6