a^2+4b^2-4ab-4c^2---factorise
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- a² + 4 b² - 4 ab - 4 c ²
= (a - 2 b)² - (2 c )²
Using a²-b²= (a+b)(a-b) , we get
= ( a - 2 b + 2 c)(a - 2 b - 2 c )
Thank u.
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Thank you for helping..
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