Resposta :
Resposta:
a) (4-9x +2) + (6 + 7x - 1) --> (6 - 9x) + (5 + 7x) --> 6 - 9x + 5 + 7x --> 11 - 2x
b) (10 - 4x + 7) - (6 + 7x - 1) --> (17 - 4x) - (5 + 7x) --> 17- 4x - 5 - 7x --> 12 - 11x
c) x² + 3x - 28
d) nao sei, desculpa
Resposta:
a) (4-9x +2) + (6 + 7x - 1) --> (6 - 9x) + (5 + 7x) --> 6 - 9x + 5 + 7x --> 11 - 2x
b) (10 - 4x + 7) - (6 + 7x - 1) --> (17 - 4x) - (5 + 7x) --> 17- 4x - 5 - 7x --> 12 - 11x
c) x² + 3x - 28
d) nao sei, desculpa