Q. 214.0( 18 Votes )

# <span lang="EN-US

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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