Question 698627
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)