Question

Dados os polinômios p(x) = x2 – 4x + 3 ; q(x) = -2x + 4 e r(x) = 2x3 – 4x + 5, calcule: a) p(x) + r(x)              b) q(x) – p(x)               c) p(x) . q(x)

Answer 1

$a)  x^{2} -4х +3 + 2x^{3} -4x +5 = 2x^{3} + x^{2} -8x + 8 b) -2x +4 -x^{2} +4x -3 = -x^{2} +2x +1 c) (x^{2} × (-2x)) + (x^{2} × 4) + (-4x × (-2x)) + (-4x × 4) + (3 × (-2x)) + (3 × 4) = -2x^{3} +4x^{2} +8x^{2} -16x -6x +12 =  -2x^{3} +12x^{2} -22x +12  <span>$