I would immediately reduce this by div. every term by -2:
x^2 + 8x + 22 = 0
Next, I'd "complete the square:"
x^2 + 8x + (4)^2 - (4)^2 + 22 = 0
(x + 4)^2 - 16 + 22 = 0, so that (x+4)^2 + 4 = 0.
Then sqrt( (x+4)^2 = sqrt(-4)
x+4 = plus or minus i*2
x = -4 plus or minus i*2 (answer)
Its point c because you just make the 3 negative and c happens to be right on top of it
Host A: 60+13.25h
Host B: 75+11.5h
60+13.25h =75+11.25h
subtract 11.25h from each side
60+2h = 75
subtract 60 from each side
2h = 15
divide by 2
h = 7.5
at 7.5 hours the two hosts will charge the same
Step-by-step explanation:
X = 10 (use pyth)
Y = 11.18(use pyth)
