A parabola opening up or down has vertex (0, 3) and passes through (-10, -2). Write its
equation in vertex form.
Simplify any fractions.

y = -1/20x^2 + 3.

Step-by-step explanation:

The vertex form is:

y = a(x - 0)^2 + 3

When x = -10 y = -2, so:

-2 = a(-10)^2 + 3

-2 = 100a + 3

100a = -5

a = -1/20.

set each factor equal to 0

4x-3 = 0

2x-1 = 0

solve for x.

4x-3=0

4x=3

x= 3/4

solve for x. 

2x-1= 0

2x= 1

x= 1/2

eventually after a few more steps, your answer should be 1/2 is less than or equal to x and 3/4 is greater than or equal to x