For this case, what you should do is follow the steps below.
Step 1:
Cross product for sum of fractions.
Step 2:
Rewrite the expression Adding and subtracting terms from the same grade.
Step 3:
Simplify expression.
Answer
Option 4
See attached image.
Step 1:
Cross product for sum of fractions.
Step 2:
Rewrite the expression Adding and subtracting terms from the same grade.
Step 3:
Simplify expression.
Answer
Option 4
See attached image.