factorise 7root2 xsquared minus 10x minus 4root2.
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Solution :
7√2x² - 10x - 4√2
= 7√2x² + 14x - 4x - 4√2
= 7√2x(x + √2 )- 4(x+√2)
= (x + √2 )( 7√2x - 4 )
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