на фото смотри/%/%/%/%/%
2x^4-x^2-1=0
2t^2-t-1=0
t=1
t= - 1/2
x^2 = 1
x^2 = -1/2
x1= -1
x2 = 1
2) x= 1 -1/2y^2
x= 1 -y
на фото смотри/%/%/%/%/%
2x^4-x^2-1=0
2t^2-t-1=0
t=1
t= - 1/2
x^2 = 1
x^2 = -1/2
x1= -1
x2 = 1
2) x= 1 -1/2y^2
x= 1 -y