Question

10 times a number is 25 more than the number's square. Find the number

Answer 1

Solution:

Let the number be x,

A.T.Q.

=> 10x = x² + 25

=> x² - 10x + 25 = 0

=> (x - 5) (x - 5) = 0

=> x = 5 or 5

Therefore, the number is 5.