Question

The product of a number and three is four less than 60. Find the number.

Answer 1

hii!

n(n-4) = 60

n^2 - 4n - 60 = 0

( n - 10 )(n + 6 ) = 0

n-10 = 0 ---> n = 10 ---> 10*(10-4) = 10*6 = 60

n+6 = 0 --> n = -6 ---> -6 * (-6-4) = -6 * -10 = 60