Question

What two numbers multiply to -84 and add to 5

Answer 1

From the top of your head you know 12 * 7 = 84.

But let's rearrange it to suit.

12 * - 7 = -84

12 + (-7) = 12 - 7 = 5.

So the two numbers are 12 and -7.

Answer 2

12 & -7

multiplied = -84
added 12 + -7 = 5