The Total solution for NCERT class 6-12
Substitute in xy + 4 = 0, we get
⇒ x(– x) + 4 = 0
⇒ –x2 + 4 = 0
⇒ x2 =4
⇒ x=2
So when x = 2, y = – 2
And when x = – 2, y = 2
Thus, the points are (2, – 2) & (– 2, 2)