SOLUTION: Find the vertex, focus and directrix of the parabola. [NOTE: fractions must be reduced and mixed numbers have to be reported as improper fractions] y = x2 - 20x + 10

Algebra ->  Trigonometry-basics -> SOLUTION: Find the vertex, focus and directrix of the parabola. [NOTE: fractions must be reduced and mixed numbers have to be reported as improper fractions] y = x2 - 20x + 10      Log On


   

Question 192147This question is from textbook
: Find the vertex, focus and directrix of the parabola. [NOTE: fractions must be reduced and mixed numbers have to be reported as improper fractions]
y = x2 - 20x + 10 This question is from textbook

Answer by Mathtut(3670) About Me  (Show Source):
You can put this solution on YOUR website!
y=%28x%5E2-20x%2B100%29-100%2B10
:
y=%28x-10%29%5E2-90
:
vertex is at (10,-90)
:
focus is at (10,-90 + 1/4) (10,89 3/4)(10,359/4)
:
directrix is at y=-90-1/4 =-90 1/4.....y=-361/4