Question

faça as operações indicadas, sabendo que:
A= 3x + 1
B= 4x + 2
C= 4x - 2

a) A+B
b) A+C
c) A•B
d) A•C

Answer 1

a) A + B -> 3x + 1 + 4x + 2 -> 7x + 3 -> x = - 3/7
b) A + C -> 3x + 1 + 4x - 2 -> 7x - 1 - > x = 1/7
c) A.B -> 3x + 1 + 4x + 2 -> 12x^2 + 6x + 4x + 2 -> 12x^2 + 10 x + 2
d) A.C -> 3x + 1 . 4x - 2 -> 12x^2 - 6x + 4x -2 -> 12x^2 -2x -2