7 th grade daughters math homework

Question

The product of four numbers,A,B,C,D is a negative number.The table shows one combination of positive and negative signs of the four numbers that could produce a negative product.Complete the table to show the seven other possible combinations.

a. b. c. d

+ + + -

1_. ? ,? ? ?

2____?___?__?___?

3____?___?__?___?

4____?___?__?___?

5____?___?__?___?

6____?___?_. ?___?

7____?___?__?___?

+. +. +. -

please help me with this problem!

Answer 1

For the product to be negative an odd number of negative signs must be in the factors

n p p p

p n p p

p p n p

p p p n

n n n p

n n p n

n p n n

p n n n