The product of some negative number and 3 less than twice that number 665. Find the number.

x = 19, - 17.5

Step-by-step explanation:

The first term for some negative number = x

the second term is thrice less than twice that number = 2x - 3

The product is 665 : x (2x-3) = 665

= 2x^2 - 3x - 665 = 0

divided by 2,

quadratic equation,

x = 19, - 17.5