Question

what will be the sigh of the product a ×b if. (i) a is the product of 5 positive integers and b is the product of 9 negative.


please my answer okkkkkkk​

Answer 1

Answer:

3, 5, 7, 9, 11

3*5 = 15

7*9 = 63

15* 63 = 945

945 * 11 = 10, 395

-3, -5, -7, -9, -11

-10,395

An odd number of odd integers will yield a negative integer; an even amount of negative integers will yield a positive integer.

10,395 * 339 = 3,523,905

As a test, multiply any two of the odd integers I listed above (the even ones) and they will always yield a negative:

3*5 = 15

3*7 = 21

3*9 = 27

3*11 = 33

5*7 = 35

5*9 = 45

5*11 = 55

7*9 = 63

7*11 = 77

9*11 = 99

Answer 2

Answer:

If  and number times of positive number comes it will stay always positive

+

If odd number of times a negative number comes it will always stay negative and fi even number of numbers  come it will stay positive

(+x) * (-y) =-xy

so your number is negative