Question

Difference of the square and square root of a perfect square number is 78. Sum of square and square root of the number is

Answer 1

let say number = x^2

square of number = x^4

square root of number = x

x^4 - x = 78

by hit and trial method we can find

that value of x = 3

3^4 = 81

81-3 = 78

to be find out

x^4 + x = ?

3^4 + 3

81 + 3

= 84

x^2 = 3^2 = 9

number = 9