Question

упростите вырожение

Answer 1

Надеюсь ты всё поймёшь

Answer 2

1)
$( {x}^{3} - 2 {x}^{2} + 4x + 2 {x}^{2} - 4x + 8) - x( {x}^{2} + 3x - 3x - 9) - 42 = {x}^{3} - 2 {x}^{2} + 4x + 2 {x}^{2} - 4x + 8 - {x}^{3} - 3 {x}^{2} + 3 {x}^{2} + 9x - 42 = 9x - 34$
2)
${x}^{3} + 3 {x}^{2} + 9x - 3{x}^{2} - 9x - 27 - {x}^{3} + 16x + 21 = 16x - 6$
3)
$8 {x}^{3} + 4 {x}^{2} + 2x - 4 {x}^{2} - 2x - 1 - 23 - 8 {x}^{3} - 12x = - 24 - 12x$