Question

Dados os polinômios A = 4x 2 – 8; B = 2x + 3; C = x2 – 3x + 1, efetue: a) B.C

Answer 1

Resposta:

• a) A + B= (4x2 - 8) + (2x+3). 4x2 + 2x _8 + 3 6x2 - 5.

b) A . B = (4x2 - 8) . (2x + 3) 8x3 + 12x2 - 16x - 24. c) C - B = (x2 - 3x + 1) - (2x + 3) x2 - 3x + 1 - 2x - 3 x2 - 5x - 2

d) 5 . C = 5 . (x2 - 3x + 1)

5x2 - 15x + 5.

e) B . C = (2x + 3) . (x2 - 3x + 1)

2x3 + 3x2 - 6x2 + 2x - 9x + 3

2x3 - 3x2 - 7x + 3