Question

x-√2is a factor of 7x²-4√2x -6
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Answer 1

Heya❤

$x - \sqrt{2} = 0 \\ x = \sqrt{2}$

Now,

$7x {}^{2} - 4 \sqrt{2} x - 6 \\ \\ substitute \: the \: value \: of \: x \: in \: the \: above \: equation \\ \\ 7( \sqrt{2}) {}^{2} - 4 \sqrt{2} ( \sqrt{2} ) - 6 \\ 7 \times 2 - 4 \times 2 - 6 \\ 14 - 8 - 6 \\ 14 - 14 \\ = 0$

Hope it helps you

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