Question

The difference of two numbers is 4. Their product is 221.

Answer 1

let the number be x and 221 / x
given
x-221/x=4
x²-221=4x
x²-4x-221=0
(x-2)²-225=0
(x-2)²=225
x-2=±15
x=17/-13

therefore numbers are 17 and 13