01-01-2021
Mathematics

contestada

(ii) factorize 9x^2 - y^2 + 4y - 4

Respuesta :

cwrw238 cwrw238

20-01-2021

Answer:

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

Step-by-step explanation:

9x^2 - y^2 + 4y - 4

= 9x^2 - (y^2 - 4y + 4)

= 9x^2 - (y - 2)^2

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

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

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