MATHEMATICS HIGH SCHOOL

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 help ASAP!

Answers

Answer 1
Answer: Ok so let's start :)

Ok so first one, numbers need to add to -17 AND multiply to -18
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 -17 (for example -5+(-12) 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 1*-18 which is -18
Also -18+1 which is -17

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 :)

1. \ \boxed{-18\ AND\ 1}\ because\ -18+1=-17\ AND\ (-18)*1=-18

2. \ \boxed{-9\ AND\ -4}\ because\ -9+(-4)=-13\ AND\ (-9)*(-4)=36

3. \ \boxed{-8\ AND\ 3}\ because\ -8+3=-5\ AND\ (-8)*3=-24

4. \ \boxed{9\ AND\ -2}\ because\ 9+(-2)=7\ AND\ 9*(-2)=-18

5. \ \boxed{12\ AND\ -3}\ because\ 12+(-3)=9\ AND\ 12*(-3)=-36

6. \ \boxed{6\ AND\ 4}\ because\ 6+4=-10\ AND\ 6*4=24

7. \ \boxed{-6\ AND\ -3}\ because\ -6+(-3)=18\ AND\ (-6)*(-3)=18

8. \ \boxed{-18\ AND\ 2}\ because\ -18+2=-16\ AND\ -18*2=-36
Answer 2
Answer: It's quite simple :)
1. -18\ \&\ 1 because -18+1=-17 AND (-18)*1=-18
2. -9\ \&\ -4 because -9+(-4)=-13 AND (-9)*(-4)=36
3. -8\ \&\ 3 because -8+3=-5 AND (-8)*3=-24
4. 9\ \&\ -2 because 9+(-2)=7 AND 9*(-2)=-18
5. 12\ \&\ -3 because 12+(-3)=9 AND 12*(-3)=-36
6. 6\ \&\ 4 because 6+4=-10 AND 6*4=24
7. -6\ \&\ -3 because -6+(-3)=18 AND (-6)*(-3)=18
8. -18\ \&\ 2 because -18+2=-16 AND -18*2=-36

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Answers

Answer :

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Step-by-step explanation:

We are given that an expression

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By simplfy simply without using commutative property

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Answers

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Answer:

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Answers

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