Question

Помогите решить систему

Answer 1

X^2+y^2=58
Xy=21

X=/58-y
y(/58-y)=21
/58y-y^2=21
y^2-/58y-21=0
d=58+84=142
Y1=/58+/142 / 2
Y2=/58-/142 / 2
X1=/58 - /58+/142 / 2
X2=/58 - /58-/142 / 2