Question

Помогите решить уравнение.
(3х+1)2-9(х+1)(х-1)=0

Answer 1

$(3x+1)*2-9*(x+1)(x-1)=0 \ -9 x^{2} +6x+11=0 \ 9 x^{2} -6x-11=0 \ D=36+392=432 \ x_{1} = frac{6- sqrt{432} }{22} \ x_{2} =frac{6+ sqrt{432} }{22}$