Find the missing endpoint of the line segment, given the following information: midpoint (-5,5) and endpoint (-1,0). A. (-9, 10)
B. (4,-5)
C. (9,-10)
D. (4,-10)

step-by-step explanation:

graph using a few selected

x         y

-1       15

0         6

1         2.4

2       0.96

x^2 + 81

we can factor this using difference of square binomials.

rewrite the equation:

x^2 - (-81)

factor:

(a^2 - b^2) = (√a^2 + √b^2)(√a^2 - √b^2)

(x^2 - (-81) = (x + √-81)(x - √-81)

we can remove the - from under the radical by multiplying it by i.

(x^2 - (-81) = (x + i√81)(x - i√81)

(x^2 - (-81) = (x + 9i)(x - 9i)

we can check our answer by using foil:

x^2 - 9ix + 9ix - 81i^2

x^2 - 81^2

i^2 = -1

x^2 + 81