Which pair of numbers has a product of -24 and a sum of 10?

Can someone me with this problem i don't understand i need

The probability that an adult possesses a credit card is .70. a researcher selects two adults at random. by assuming the independence, the probability that the first adult possesses a credit card and the second adult does not possess a credit card is:

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)