##### finding the x intercept

 Algebra Tutor: None Selected Time limit: 1 Day

When Given the vertex and the y intercept of the parabola , use (y-k)=a(x-h)^2 where a=0

Find the X intercept of the parabola with vertex (1,1) and y intercept (0,3) write your answers in this form (x2,y2) , (x2,y,2)

Oct 12th, 2015

(y-k)=a(x-h)^2

given (h, k ) = (1,1)

put the values

(y-1)=a(x-1)^2

now put the values from other point (0,3)

(3-1)=a(0-1)^2

2 = a

put the value of a in parabola equation

(y-1)=2(x-1)^2

for x intercept y=0

so

(0-1)=2(x-1)^2

-1 = 2 (x^2 +1 -2x)

-1/2 =  (x^2 +1 -2x)

x^2 +1 -2x +1/2 = 0

x^2-2x+1.5 = 0

solve it by using quadratic formula

you will get values of x which are x = 1+0.707i and 1-0.707i

so the answer for x intercept are

(x2,y2) = (1+0.707i , 0)

(x2,y2) = (1- 0.707i , 0)

please go to your home page . click on promotion who has a heart icon add my name MAXX57 in the open window and promote me we both will get 10\$ by study pool promote and best me dear :) best of luck
Oct 12th, 2015

...
Oct 12th, 2015
...
Oct 12th, 2015
Dec 2nd, 2016
check_circle