Find all the numbers which exceeds their square root by 12?
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let x is any number
according to question ,
x - x^1/2=12
( x^1/2)^2 - x^1/2 -12=0
let x ^1/2=p
p^2-p -12=0
(p-4)(p+3)=0
p=4 and -3
but x^1/2 is always positive so,
p=x^1/2=4
hence x=16
so, 16 is unknown number
according to question ,
x - x^1/2=12
( x^1/2)^2 - x^1/2 -12=0
let x ^1/2=p
p^2-p -12=0
(p-4)(p+3)=0
p=4 and -3
but x^1/2 is always positive so,
p=x^1/2=4
hence x=16
so, 16 is unknown number
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