X=12 because a half of 12 is six.
Answer:
1)





2)

Multiply
:

Apply Difference of Squares formula: 





a = 5, b = -2
We can use the points (-4,-6) and (9,-6) to solve.
Slope formula: y2-y1/x2-x1
= -6-(-6)/9-(-4)
= 0/13
= 0
Hope This Helped! Good Luck!
Yes should be the right answer
9514 1404 393
Answer:
C) -1 +21i
Step-by-step explanation:
For many purposes, "i" can be treated as though it is a variable. Collect terms in the usual way.
(-2 +12i) -(-1 -9i) . . . . given
= -2 +12i +1 +9i . . . . use the distributive property to eliminate parentheses
= (-2+1) +(12i +9i) . . . group like terms
= -1 +21i