SOLUTION: 1) Write the equation of the parabola in Standard Form that an x-intercept of (2,0) and a vertex at (6,8). Not sure how to set up:( 2)Solve for x: [(3)/(3-x)] + [(4)/x+2)]=4.

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equation Customizable Word Problems -> SOLUTION: 1) Write the equation of the parabola in Standard Form that an x-intercept of (2,0) and a vertex at (6,8). Not sure how to set up:( 2)Solve for x: [(3)/(3-x)] + [(4)/x+2)]=4.       Log On


   



Question 391829: 1) Write the equation of the parabola in Standard Form that an x-intercept of (2,0) and a vertex at (6,8). Not sure how to set up:(
2)Solve for x: [(3)/(3-x)] + [(4)/x+2)]=4. I think -3+-sqrt681/-8 ??

Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!

Hi
Parabola with x-intercept of (2,0) and a vertex at (6,8).
Using the vertex form of a parabola, y=a%28x-h%29%5E2+%2Bk where(h,k) is the vertex
writing in the vertex form:
y = a(x-6)^2 + 8 Using x-intercept Pt(2,0)to solve for a
0 = a(-4)^2 +8
-8= 16a
-1/2 = a
y = (-1/2)(x-6)^2 + 8 written in the vertex form
Standard form a parabola is y = ax^2 + bx + c
y = (-1/2)[(x-6)^2 - 16]
y = -(1/2[x^2 - 12x + 36 - 16]
y = -(1/2)x^2-12x + 20
solving
[(3)/(3-x)] + [(4)/x+2)]=4
%28-3%29%2F%28x-3%29+%2B+4%2F%28x%2B2%29+=+4
-3(x+2) + 4(x-3) = 4(x+2)(x-3)= 4(x^2 - x - 6)
-3x - 6 + 4x - 12 = 4x^2 - 4x - 24
4x^2 -5x - 6 = 0
x+=+%285+%2B-+11%29%2F%288%29+ x = 2 and x = -6/8 = -3/4