Question

What multiplies to 42 and adds to -27

Answer 1

Consider ways to multiply to get 42. Then see if the numbers can be used to make -27.

42 = 21 × 2...not going to work.
42 = 14 × 3...not going to work. (Though -14 and -3 add to -17)
42 = 7 × 6...not going to work.

There are no whole number solutions to this question.