Problem: Consider the statements:
I: (−4)(−16)=(−4)(−16),
II: (−4)(−16)=64, and
III: 64=8.
Of these the following are incorrect:
Answer Choices:
A. none
B. I only
C. II only
D. III only
E. I and III only
Solution:
−4=2−1,−16=4−1∴(−4)(−16)=8(−1)=−8 but (−4)(−16)=64=8 ∴ Statement I is incorrect.