show that x minus root 2 is a factor of the polynomial x cube minus 2 root 2 x square - 10 x + 12 root 2 gece factorise the polynomial
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Step-by-step explanation:
x = root 2
f (root 2) = root 2^3 - 2 root 2(root 2)^2-10 (root 2) + 12 root 2
= 2 root 2 - 4 root 2 + 2 root 2
= 0
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