Question

решите уровнение (x+1)^3-(x-1)^3=x(6x+2)

Answer 1

(x+1)³-(x-1)³=x*(6x+2)
(x+1-(x-1))*(x+1)²+(x+1)(x-1)+(x-1)²=6*x²+2x
2*(x²+2x+1+x²-1+x²-2x+1)=6x²+2x  I÷2
3*x²+1=3x²+x
x=1.
Ответ:   х=1.

Answer 2

X+1*3-x-1*3=6x+2 X- x-6x=2-1*3+1*3 -6x=6 X=-1