Please help me please help me out with these (a) I don't know how to solve this (a) 2 and 3

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Which polynomial function has x intercepts -1, 0, and 2 and passes through the point (1, -6)

The jewelry store is having a sale. necklaces that were regularly priced at $23.50 are on sale for $18.80. what is the percentage of decrease in the price of necklaces?

What is negative 3/9 times negative 2/8 ?