Question

com as letras a b e c vamos indicar esses polinomios
a= x+2
b= 2x-5
c= 3x+4

agora, calcule:
a) b + ac
b) c - ab

Answer 1

a) b+a.c= 2x-5+(x+2).(3x+4)
b+a.c= 2x-5+(3x²+4x+6x+8)
b+a.c= 2x-5+(3x²+10x+8)
b+a.c= 2x-5+3x²+10x+8
b+a.c= 3x²+12x+3

b) c-a.b= 3x+4-(x+2).(2x-5)
c-a.b= 3x+4-(2x²-5x+4x-10)
c-a.b= 3x+4-(2x²-x-10)
c-a.b= 3x+4-2x²+x+10
c-a.b= 2x²+4x+14