Question

1) ( X2 – 2X ) – ( X2 – 2X – 2 ) =
2) ( 2a – 3b + 7c ) + ( - 4a – 9b – 8C ) =
3) ( X2 – 2X ) – ( X2 – 2X – 2 ) + ( 2X2 – 2 ) =

Answer 1

Respuesta:

1)

${x}^{2} - 2x - {x}^{2} + 2x - 2 = 2$

2)

$2a - 3b + 7c - 4a - 9b - 8c = - 2a - 12b - c$

3)

${x}^{2} - 2x - {x}^{2} + 2x + 2 + 2 {x}^{2} - 2 = 2 {x}^{2}$