Use 1 as a benchmark to compare 6/5 and 5/6

Ineed to know the answer to this algebra question.

Which of the following quartic functions has x = –1 and x = –2 as its only two real zeroes?

Acompany produces packets of soap powder labeled “giant size 32 ounces.” the actual weight of soap powder in such a box has a normal distribution with a mean of 33 oz and a standard deviation of 0.7 oz. to avoid having dissatisfied customers, the company says a box of soap is considered underweight if it weighs less than 32 oz. to avoid losing money, it labels the top 5% (the heaviest 5%) overweight. how heavy does a box have to be for it to be labeled overweight?