Which two numbers add up to and multiply to
1. multiply to -18 add to -17
2. multiply to 36 add to -13
3. multiply to -24 add to -5
4. multiply to -18 add to 7
5. multiply to -36 add to 9
6. multiply to 24 add to 10
7. multiply to 18 add to -9
8. multiply to -36 add to -16
i need asap!

It's quite simple :)
1. because AND
2.  because AND
3.  because AND
4.  because AND
5.  because AND
6.  because AND
7.  because AND
8.  because AND

Ok so let's start :)

Ok so first one, numbers need to add to AND multiply to
First of all you need to check the signs which stands near to those numbers. As you see there is next to both of them, it means that ONLY one number needs to be with sign. Why? There is short "instruction" which you need to remember:




If there are to signs next to each other, you can "change" them using "rules" below ;P




So it is possible to add two numbers with sign next to them which would be equal to (for example but it is impossible to find two numbers which have sign next to them which will give you also negative number after multiplication :)

Ok it's enough theory for now, it should be much easier now :D

1. So you can multiply which is
Also which is 

Rules above should help you to understand what I did below :) In case of any questions you can help me anytime :)

It's quite simple :)

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Hope i can you!