Respuesta :

wegnerkolmp2741o

9x^2-4y^2

(3x-2y) (3x+2y)

Choice C

dancer2416

Factors 9x^2-4y^2 :

Rewrite 9x^2 as 3x^2           Hint: because 9/3=3

Rewrite 4y^2 as 2y^2           Hint: because 4/2=2

  • Remember whatever you do on one side you have to do the other.

Then you say: (3x)^2- (2y)^2

  • Since both terms are perfect squares, factor using the difference of squares formula, a^2 - b^2 = (a+b)(a-b) = (3x+2y) (3x−2y)

Multiply 2 by -1 to get:

C. (3x+2y) (3x−2y)


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