Complete the square to find the vertex of this parabola. x2 + 10x - y + 15 = 0​

y

=

x

2

−

10

x

+

15

Rewrite the equation in vertex form.

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y

=

(

x

−

5

)

2

−

10

Use the vertex form,

y

=

a

(

x

−

h

)

2

+

k

, to determine the values of

a

,

h

, and

k

.

a

=

1

h

=

5

k

=

−

10

Find the vertex

(

h

,

k

)

.

(

5

,

−

10

)

image of graph

answer: b.

step-by-step explanation:

the y coordinate for point b is 0, and answer b is the only one with that y coordinate.

i think it is 70

step-by-step explanation: