Question

(X-1)(x+1)=x (x+3) помогите пожалуйста

Answer 1

$(x - 1)(x + 1) = x(x + 3) \\ {x}^{2} - 1 = {x}^{2} + 3x \\ - 1 = 3x \\ x = - 1 \div 3 \\ x = - \frac{ 1}{3}$