Question

1. Evaluate each expression:

a. −12•13


b. −12•−13


c. 12•(−54)


d. −12•(−54)

Answer 1

a. −12•13= -156

b. −12•−13= 156

c. 12•(−54) = -648

d. −12•(−54) = 648

Explanation:

a and c have negative

b and d have positive

hope this helps ;)