Question

1) reduza os termos semelhantes:
a) 1-{ x+ 2x-( x²-4+2x)+3x²]-3}+x=

Answer 1

1-{x+2x-(x²-4+2x)+3x²]-3}+x=

{3x-(x²+3x²-4-3+2x+x)}=

{3x+2x²-7+3x}=

3x+3x+2x²-7=

6x+2x²-7