Question

factorise form of 63 x square - 448

Answer 1

Solution :

63x²- 448

= 7 ( 9x² - 64 )

= 7 [ ( 3x )² - 8² ]

= 7 ( 3x + 8 )( 3x - 8 )

[ Since , a² - b² = ( a + b )( a - b ) ]

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Answer 2

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