An expression is undefined when you divide by zero. A simple example is 1/0 which in english is "one over zero"
You cannot have zero in the denominator. Something like 0/1 is allowed as it is equal to 0. In other words, 0/1 = 0. But 1/0 is not allowed.
I believe its the last one 8v2
Is this 2 questions or is it just one whole question?
Answer:
-4a +22b
Step-by-step explanation:
add the ones with same variable