please help me understand this!
Factor: 9x^2 - 24x + 16
(3x - 4)2
(3x - 8)2
(3x - 8)(3x + 8)
(3x - 4)(3x + 4)

I know that im supposer to multiply 16 and 9 which equals 144 but i have to find the factors that multiply to get 144 and add to get -24 i just cant seem to find that number =p

Question

please help me understand this!
Factor: 9x^2 - 24x + 16 
    (3x - 4)2 
   (3x - 8)2 
   (3x - 8)(3x + 8) 
   (3x - 4)(3x + 4) 
 
 I know that im supposer to multiply 16 and 9 which equals 144 but i have to find the factors that multiply to get 144 and add to get -24 i just cant seem to find that number =p

anonymous · Answer

-12*-12=144
-12-12=-24

9x^2-12x-12x+16

got it now?

anonymous · Answer

yup thank you so much!