SOLUTION: write the equation of the parabola y=x^2-18x-76 in standard form. a. y-9=(x-9)^2 c. y+76=(x-9)^2 b. y+81=(x-9)^2 d. y+157=(x-9)^2

Algebra ->  Quadratic-relations-and-conic-sections -> SOLUTION: write the equation of the parabola y=x^2-18x-76 in standard form. a. y-9=(x-9)^2 c. y+76=(x-9)^2 b. y+81=(x-9)^2 d. y+157=(x-9)^2      Log On


   

Question 698627: write the equation of the parabola y=x^2-18x-76 in standard form.
a. y-9=(x-9)^2 c. y+76=(x-9)^2
b. y+81=(x-9)^2 d. y+157=(x-9)^2
Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
write the equation of the parabola y=x^2-18x-76 in standard form.
y=x^2-18x-76
complete the square:
y=(x^2-18x+81)-81-76
y=(x-9)^2-157
(y+157)=(x-9)^2 (ans. d)
This is a parabola that opens up with vertex at (9,-157)