Question

решите систему уравнений

Answer 1

x+y=-5
x²-y²=13
(x-y)(x+y)=13
x-y=-13/5
x+y+x-y=-5-13/5
2x=-38/5
x=-19/5
x+y=-5
y=-5+19/5=6/4
(6/5 -19/5)