Question

Simplifique o polinômio P(x) = (x2 + 2x)(x + 3) + 3x2 - 2x - 1

Answer 1

P(x) = (x² + 2x).(x + 3) + 3x² - 2x - 1

P(x) = x².x + x².3 + 2x.x + 2x.3 + 3x² - 2x - 1

P(x) = x³ + 3x² + 2x² + 6x + 3x² - 2x - 1

P(x) = x³ + 3x² + 2x² + 3x² + 6x - 2x - 1

P(x) = x³ + 8x² + 4x - 1