Wednesday

April 16, 2014

April 16, 2014

Posted by **Cynthia** on Wednesday, April 2, 2008 at 4:08pm.

Write the quadratic function in the form a(x-h)^2+k

y=x^2-2x-9

(x^2-2x)-9

(x^2+2x+1-1)-9

(x^2+2x+1)

answers

(x+1)^2 or x^2-2x-9=y

- Algebra -
**Anonymous**, Wednesday, April 2, 2008 at 7:17pmI believe you are missing k. Remember y = x^2-2x-9 and y = a(x-h)^2+k. What you have gotten for y is (x+1)^2. If you expand it, you'll see that it is x^+2x+1 which is not equal to x^2-2x-9. From your work which I believe is mostly correct but you made a tiny mistake. You pulled out -9 and -1, -10, from the original equation. That should be what you're missing. Even though you pulled them out they don't disappear into thin air ;/.

- Algebra -
**Cynthia**, Thursday, April 3, 2008 at 12:42amSo.....

from your answer I need to add a -10 to (x+1)^2+2x+-10?

**Related Questions**

algebra - could you please multiply these together and tell me what you come up ...

Algebra - I have this math probelm z-(3z)/(2-z)=(6)/(z-2) in my book it says to ...

Algergra - I am stumped! I have been working on these problems for the longest ...

Algebra - (3X+1)/(3)-(3/2)=(1-X)/(4) I am having trouble simplifying the ...

math 116 - I am taking math 116 , I am to find the solution to the problem 9x-3y...

Math - I am having trouble figuring the appropriate expression for this problem...

Lee - For my class you have to choose from several different scenarios, make up ...

math - For my class you have to choose from several different scenarios, make ...

US History Since 1876 - How is the KKK and the Universal Negro Improvement ...

Math - Does studying for an exam pay off? The number of hours studied, x, is ...