Tgx + tg(180°- x) + ctg(360°- x) = ctg(180°- x):​

12.57/10=1.257

62/10=6.2

b4=b1*g^3

b1=b4/g^3

g^3=-3*(-3)*(-3)=-27

b1=-54/-27

b1=2

y^2+ax^2-a^2=4

y-x=a

y=x+a

(x+a)^2+ax^2-a^2=4

x^2+2ax+a^2+ax^2-a^2=4

(a+1)x^2+2ax-4=0

d=b^2-4ac=0

d=4a^2+16(a+1)=0

a^2+4a+4=0

a1,2=(-4±sqrt(16-16))/2=-4/2=-2

одно решение при а=-2