Question

25x^2y^2 - 49

factorise it

Answer 1

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25 x² y² - 49

⇒ ( 5xy )² - ( 7 )²

Using identity ;

a² - b² = ( a + b ) ( a - b )

Here,

a = 5xy

b = 7

( 5xy )² - ( 7 )²

⇒ ( 5xy + 7 ) ( 5xy - 7 )

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Thanks!!

Answer 2

25 x² y² - 49

⇒ ( 5xy )² - ( 7 )²

Using identity ;

a² - b² = ( a + b ) ( a - b )

Here,

a = 5xy

b = 7

( 5xy )² - ( 7 )²

⇒ ( 5xy + 7 ) ( 5xy - 7 )