(x2/25) – 4 = 0

(v) (x²/25)  – 4 = 0

Sol. (x²/25)  – 4 = 0

Multiplying throughout by 25, we get,

x² – 100 = 0

∴  x² + 0x – 100 = 0

Now it is in the standard form of ax² + bx + c = 0