Question

Find the x-intercept(s) and the coordinates of the vertex for the parabola y=x^2-10x+21 If there is more than one -intercept, separate them with commas

Answer 1

1)
first factor the the quadratic x^2-10 + 21
(x )(x )
then set each of your 2 binomials to zero
these are the x intercepts.

2
)from
y = ax2 + bx + c.

to find the vertex you can use the formula:

-b/2a

this will give you the x value of the vertex
to find the y just plug the x value into the quadratic



can you factor the quadratic????