Question

Based on the graph of y = x2 − 2x − 3, what is the x coordinate of the positive x-intercept?

Answer 1

Solve this equation and you will get two answers. The one with + sign is the right one :)

Answer 2

Do you know how to solve it?

Answer 3

You could factor it or graph it, but it wants you to graph it

Answer 4

i still don't know how to graph it

Answer 5

@iGreen

Answer 6

Do u know the shape of x^2 graph?

Answer 7

y = ax2 + bx + c
since a i positive, this parabola will be opening upward
First we want to find the vertex of this parabola. We can find the x coordinate by the formula -b/2a, in our equation b= -2 and a=1 so we have 2/2*1 which means the x coordinate is 1, to find the y coordinate we plug in 1 to the equation, y=1^2-2(1)-3
Y=1-2-3=-4
the coordinates of the vertex is (1,-4)
now you can make an x and y table to find the other points.