The square of a number is 6 greater than 5 times the number. Let the number be denoted by X.
X^2 = 6 + 5X
=> X^2 - 5X - 6 = 0
=> X^2 - 6X + X - 6 = 0
=> X(X - 6) + 1(X - 6) = 0
=> (X + 1)(X - 6) = 0
=> X = -1 and X = 6
The square of the numbers -1 and 6 is 6 greater than 5 times the number.
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