Answer:
C. 
Step-by-step explanation:
Consider the expression 
First, note that

Find the discriminant

Now,

Write the factored form:

Answer:
12
Step-by-step explanation:
Bone dry, sorry nothing I can do about that
add all amd divide by the 40 ???let me know if im wrong
3z because the product means multiplication so it would be 3 times z which is just 3z