Question

simplifique as expressões (x²-3x+7)+(3x²+3x-7)

Answer 1

x²-3x+7+3x²+3x-7== 4x²

Corta -3x com +3x
Corta +7 com -7
E soma x² mais 3x²

Answer 2

x²-3x+7+3x²+3-7 =
4x²