Question

$find \: (x - \sqrt{2) \: } \: is \: \: a \: factor \: \: of \: {7x}^{2} - 2 \sqrt{8x} - 6$

Answer 1

x=√2
f(√2)=7(√2)^2-2√8√2 -6
=7×2 -4√2×√2-6
= 14-8-6
=14-14
=0
is eq zeros x=√2 is right