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Factorise : 9x 2 + 3x

+2 votes

asked Mar 22, 2022 in General by kratos

Factorise : 9x2+ 3x - 8y - 64y2

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1 Answer

+3 votes

answered Mar 22, 2022 by kratos

Best answer

9x2+ 3x - 8y - 64y2= 9x2 - 64y2 + 3x - 8y
= [ (3x)2 - (8y)2 ] + ( 3x - 8y )
= [( 3x + 8y )( 3x - 8y )] + ( 3x - 8y )
= ( 3x - 8y )( 3x + 8y + 1 )

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