tamarius10009 tamarius10009
  • 13-09-2018
  • Mathematics
contestada

Factor 9b^2 - 4.

(3b + 1)(3b - 4)
(3b + 2)(3b - 2)
(3b - 2)(3b - 2)

Respuesta :

z5tequ2u
z5tequ2u z5tequ2u
  • 13-09-2018

The answer should be (3b + 2)(3b - 2) since if you multiply those two, you will get back to original equation.

Hope this helps!

Answer Link
GoddessofDork
GoddessofDork GoddessofDork
  • 13-09-2018

So for this, we will be applying the difference of squares, which is [tex]x^2-y^2=(x+y)(x-y)[/tex]

In this case:

[tex]9b^2-4=(3b+2)(3b-2)[/tex]

The correct answer is the second option.

Answer Link

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