Question

The square of a number is 12 less than 7 times the number. What is the number?
–4 or –3
–4 or 3
–3 or 4
3 or 4

Answer 1

let "a number" be n

"12 less" implies n - 12

"7 times" implies 7n

"square of a number" implies n^2

7n - 12 = n^2

solve for n

Answer 2

The answer must be x=4, because 4*(4-1) = 4*3 =12. And, if negative numbers are allowed, x = -3, because (-3)(-4) = 12. That;s all such numbers.

I looked it up thats what I found

Answer 3

https://www.wyzant.com/resources/answers/159197/a_number_is_12_less_than_its_square_find_all_such_numbers