Please help me I need all of these answers

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

Table which ratio is equivalent to 3: 7? 6: 7 3: 21 24: 56 15: 30

The marked price of an article is 25% above its selling price and the cost price is 30% less than its marked price . find the discount percent and gain percent. only a brainlest can solve it i will mark you brainlest