Question

Dados:
A = 6x^2 - 5x - 6
B = 2x^2 + 5x - 12
C = 2x - 3
D = x + 4
Calcule :
a) B . C
b) D^2 = D . D
c) B : C
d)t(A + B) . C

Answer 1

a) (2x² + 5x - 12)(2x - 3)
    4x³ - 6x² + 10x² - 15x - 24x + 36
    4x³ + 4x² - 39x + 36

b) (x + 4)² = x² + 8x + 16

c) 2x² + 5x - 12 : 2x - 3 = x + 4

d) [(6x² - 5x - 6) + (2x² + 5x - 12)][(2x - 3)
    [6x² - 5x + 6 + 2x² + 5x - 12][2x - 3]
    [8x² - 6][2x - 3]
    18x³ - 24x² - 12x + 18