Question

Simplifique os polinômios: a) 7xy + 4xyz - 4xyz -8xy b) -9a -5b - 3ab + 5b + 3ab + 9a - 5c c) 2x3 + 10x2+ 5x - 8x2 - x3 URGENTEEEE

Answer 1

Resposta:

a) -xy ;  b) -5c :  c) x3 + 2x2 + 5x

Explicação passo a passo:

a) 7xy + 4xyz - 4xyz -8xy = (7 -8)xy + (4 - 4)xyz = (-1)xy + 0.xyz = -xy

b) -9a -5b - 3ab + 5b + 3ab + 9a - 5c = (9 -9)a + (5 -5)b + (3 - 3)ab - 5c

= 0.a + 0.b + 0.ab - 5c = -5c

c) 2x3 + 10x2+ 5x - 8x2 - x3 = (2 -  1)x3 + (10 - 8)x2 + 5x = x3 + 2x2 + 5x