Question

решите пж
упростите выражения
1) (х+2)^3-x(3x+1)^2+(2x+1)(4x^2-2x+1)

Answer 1

$= {x}^{3} + 6 {x}^{2} + 12x + 8 - x(9 {x}^{2} + 6x + 1) + 8 {x}^{3} + 1 = \ = {x}^{3} + 6 {x}^{2} + 12x + 8 - 9 {x}^{3} - 6 {x}^{2} - x + 8 {x}^{3} + 1 = \ = 11x + 9$