Question

1) simplifique as expressões

A - y. ( y + 2 ) -2y . ( 3 - y )

B - ( 2 + x ) ^2 - ( x + 2 ) ^2

Answer 1

A=-y.(y+2)-2y.(3-y)
    -y²-2y-6y+2y²
    y²-8y
 
B=-(2+x)+2-(x+2)+2
    -2-x+2-x-2+2
     -2x   .(-1)
      2x
      x=-2