Question

1) Dados A=x-2ax+aeb=5x+3ax-4a, determine:
a) A+B b) A-B

Answer 1

 a) A + B =   x - 2ax + a + 5x + 3ax - 4a 
     A  + B =  x + 5x - 2ax + 3ax + a - 4a 
     A + B  =  6x + ax - 3a
===========================

a) A - B = x - 2ax + a - ( 5x + 3ax - 4a
    A - B = x - 2ax + a - 5x - 3ax + 4a
    A - B = x - 5x -2ax - 3ax + a + 4a
    A - B = - 4x - 5ax + 5a