Question

6x^2-8x+1-9x^2-2x+7-7x^3+x^2

Answer 1

Olá Camile!

${6x}^{2} - 8x + 1 - {9x}^{2} - 2x + 7 - {7x}^{3} + {x}^{2}$

${ - 2x}^{2} - 10x + 8 { - 7x}^{3}$

$= { - 7x}^{3} - {2x}^{2} - 10x + 8$

Bons estudos...