Is BCD a straight line?

Which value is not a solution of 8x^3 – 1 = 0

Ineed to know the ordered pairs for this equation i need the answer quick because it’s a timed test

Afactory buys 10% of its components from suppliers b and the rest from supplier c. it is known that 6% of the components it buys are faulty. of the components brought from suppliers a,9% are faulty and of the components bought from suppliers b, 3% are faulty. find the percentage of components bought from supplier c that are faulty.