Answer:
I think the answer is C.
Step-by-step explanation:
I hope this helps :)
Answer:
first one with -1...21
Step-by-step explanation:
only one that follows quadratic formula format
Answer:
ab - ac + db - dc
Step-by-step explanation:
you distribute the variables inside the parenthesis
Yes they are equivalent expressions. If you take the z to the power of two, and subtract that from the other z to the power of two, it is zero. So you are left with four which is the answer