factorise it's urgent
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7√2x²-10x-4√2
=> 7√2x² - (14-4)x - 4√2
=> 7√2x² - 14x + 4x - 4√2
=> 7√2x ( x-√2 ) + 4 ( x-√2 )
=> ( 7√2x+4 )(x-√2)
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