7) A. A variable is an unknown value, and x is unknown. Constants are known values so they cannot have X in it.
8)A again for the same reason as number 7
Answer:
It's first term is - 6. Fifth term is 6
Answer:
THATS THE ANSWER
Step-by-step explanation:
Answer:

Step-by-step explanation:

Expand brackets.

This is in quadratic form.

Since this is for equal roots:







Plug k as 0 to check.

False.
So that means k must equal 6.