Question

решите уравнение (x-1^3)-x^2(x-4)-(x+2)(x-2)=0

Answer 1

$(x - 1 {}^{3} ) - x {}^{2} (x - 4) - (x + 2)(x - 2) = 0 \\ x - 1 - x {}^{3} + 4x {}^{2} - x {}^{2} + 4 = 0 \\ x - x {}^{3} + 3x {}^{2} = 1 - 4 \\ x - x {}^{3} + 3 x{}^{2} = - 3 \\ x = 3$