Step-by-step Answer
The square of a number decreased by 8 is equal to twice the number. Then according to the statement.
n² - 8 = 2n
On simplifying, we have
n² - 2n - 8 = 0
On factorizing
n² - 4n + 2n - 8 = 0
( n - 4 ) ( n + 2 ) = 0
So the number will be 4 and -2.
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