Let 
and 
Verify that AB = AC though B ≠ C, A ≠ 0.
Given
, 
and
.
We need to verify that AB = AC.
Let us evaluate the LHS and the RHS one at a time.
We will first calculate AB.
Now, the RHS is AC.
Thus, AB = AC even though B ≠ C and A ≠ O.
70
Let and
Verify that AB = AC though B ≠ C, A ≠ 0.
Given, and.
We need to verify that AB = AC.
Let us evaluate the LHS and the RHS one at a time.
We will first calculate AB.
Now, the RHS is AC.
Thus, AB = AC even though B ≠ C and A ≠ O.