Question

1)Resolva as multiplicações: A)3x . ( 5x2 + 3x – 1 = B)-2x2 (5x – 1) = C)3 (2x2 + x + 5) =

Answer 1

Resposta:

A) 3x . ( 5x² + 3x – 1) = (3x).(5x²) +(3x).(3x) + (3x).(-1) = 15x³ + 9x² - 3x

B) -2x² (5x – 1) = (-2x²).(5x) + (-2x²).(-1) = -10x³ + 2x²

C) 3 (2x² + x + 5) = 3.(2x²) + 3.x + 3.5 = 6x² + 3x + 15