Question

-3,1x²y+4,5x²y-2,7x²y

Answer 1

Resposta:

$-3.1x^2y+4.5x^2y-2.7x^2y\\\\\mathrm{Somar\:elementos\:similares:}\:-3.1x^2y+4.5x^2y-2.7x^2y=-1.3x^2y\\\\=-1.3x^2y$

Answer 2

$-3,1x^2y+4,5x^2y-2,7x^2y=\\\\-5,8\:x^2y+4,5x^2y=\\\\1,3 x^2y$