Q. 214.0( 18 Votes )

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Answer :

Given,


(3x – 4y)2 – 25z2


= (3x – 4y)2 – (5z)2


By using the formula a2 – b2 = (a + b)(a – b)


We get,


(3x – 4y)2 – 25z2 = (3x – 4y)2 – (5z)2


={(3x – 4y) + 5z}{(3x – 4y) – 5z}


= (3x – 4y + 5z)(3x – 4y – 5z)


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