Question

The product of a number and 8 less than the number is –15. Find the number. and plz explain

Answer 1

It can be 5 or 3

Explanation:

let x = that number

x * (x - 8) = -15

xx - 8x + 15 = 0

xx - 3x - 5x + 15 = 0

x(x - 3) - 5(x - 3) = 0

(x - 5)(x - 3) = 0

then x = 5 or x = 3