Respuesta :
(3x2-2)+(5x2+5x-1)
=3x-2-2+5x2+5x-1
=6x-2+25x+5x-1
=6x-2+10x+5x-1
=6x+10x+5x-1-2
=21x-1-2
=21x-3
=3x-2-2+5x2+5x-1
=6x-2+25x+5x-1
=6x-2+10x+5x-1
=6x+10x+5x-1-2
=21x-1-2
=21x-3