Question

The square of a number is 12 less than 7 times the number.what is the number?

Answer 1

n = 3 or n = 4

Explanation:

Let the unknown number be n.

Then:

n² = 7n - 12

In standard quadratic form, we have:

n² - 7n + 12 = 0

In factored form, we have:

(n - 3)(n - 4) = 0, and so

n = 3 and n = 4