Question

Помогите, пожалуйста, решить уравнение

Answer 1

$(x+3)^{4} -4(x+3)^{2} -5=0\\\\(x+3)^{2} =m \ , \ m\geq 0\\\\m^{2} -4m-5=0\\\\Teorema \ Vieta:\\\\m_{1} =5\\\\m_{2} =-1<0-neyd\\\\(x+3)^{2} =5\\\\1) \ x+3=-\sqrt{5} \\\\\boxed{x_{1} =-3-\sqrt{5} }\\\\2) \ x+3=\sqrt{5} \\\\\boxed{x_{2} =\sqrt{5} -3}$