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

User TonyTakeshi
by
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1 Answer

10 votes

Answer:

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

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).

User Colsw
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