Question

if four times a whole number is subtracted from three times the square of the number the resuilt 15 is obtained find the number

Answer 1

Answer:

3

Step-by-step explanation:

3x^2 - 4x = 15

3x^2 - 4x - 15 = 0

= 3x^2 -9x + 5x - 15

= 3x (x-3) + 5 (x-3)

= (3x+5) (x-3)

x = 3 and x = -5/3

As x is a whole number so x=3