## tylertriebs 3 years ago Which of the following equations is of a parabola with a vertex at (0, -5)? y = (x - 5)2 y = (x + 5)2 y = x2 - 5 y = x2 + 5

1. tylertriebs

ok

2. A.Avinash_Goutham

c?

3. tylertriebs

wouldnt that make it the first one then

sorry my equation was y=a(x-h)^2+k

@tylertriebs You can use -b/2a to find the x coordinate of the vertex.

6. tylertriebs

ok

@tylertriebs Now solve by formula and tell me what is the result.

take each equation separately . @tylertriebs

9. tylertriebs

ok just sec

10. tylertriebs

ok im lost

why ?

12. tylertriebs

i dont get how to include the equation

take it easy I am going to solve one equation for you.

|dw:1338548813555:dw| Put these values in formula -b/2a to get x coordiante .

@tylertriebs solve and it and tell me what is the value of x

16. tylertriebs

-5?

it means it is not your answer because vertex is (0,-5) take another equation in the same way and solve when value of x comes 0 then you will get your answer.

18. tylertriebs

ok

Now take the third equation which x^2-5....|dw:1338549273486:dw| Put these values in formula -b/2a

@tylertriebs Solve it hurry up ! And give me result.

21. tylertriebs

wouldnt that still be -5

no |dw:1338549527046:dw|

23. tylertriebs

ok

@tylertriebs Now put the value of x in x^2-5 You will get your ordered pair of (0,-5) Am I right.

25. tylertriebs

yes

27. tylertriebs

the second to last

Yes Hurrah! You Got it!

@tylertriebs

30. tylertriebs

thank you

31. A.Avinash_Goutham

congrats :) :P

It is certified that @tylertriebs is able to solve the questions of quadratic equation related to vertex and finding the value x from an equation. Signature :|dw:1338550021578:dw|

Find more explanations on OpenStudy