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April 20, 2014

April 20, 2014

Posted by **Kate** on Thursday, May 24, 2012 at 9:06pm.

There are two problems that i keep doing something wrong. could someone solve them so I can have a set up for the rest of my problems? :)

3y^2+6y+108x-969=0

and

x^2+14x=44y+313=0

All help is greatly appreciated!

- Parabolas in standard form! -
**Neil**, Thursday, May 24, 2012 at 9:12pm108x = -3y^2 - 6y + 969

108x = -3(y^2 + 2y + 1) + 972

x = -1/36 (y+1)^2 + 9

I'm not too sure how to do the second one. I'm really sorry.

- Parabolas in standard form! -
**Kate**, Thursday, May 24, 2012 at 9:21pmCan you solve this one?:

x^2-12x-48y-372=0

& I made a mistake one the second one!!

Its actually:

x^2+14x+44y+313=0 !!

- Parabolas in standard form! -
**Reiny**, Thursday, May 24, 2012 at 9:42pmx^2+14x+44y+313=0

44y = -x^2 - 14x - 313

44y = -(x^2 + 14x**+49-49**- 313

44y = -( (x+7)^2 - 49 ) - 313

44y = -(x+7)^2 + 49 - 313

44y = -(x+7)^2 - 264

44y + 264 = -(x+7)^2

44(y + 6) = -(x+7)^2

y + 6 = (-1/44) (x+7)^2 , in the form that was requested.

x^2-12x-48y-372=0

x^2 - 12x - 372 = 48y

x^2 - 12x**+36**= 48y + 372**+36**

(x-6)^2 = 48y + 408

(x-6)^2 = 48(y + 8.5)

y + 8.8 = (1/48) (x-6)^2

- Parabolas in standard form! -
**Kate**, Thursday, May 24, 2012 at 9:48pmWOW!

Thank you so much! you made more sense than my teacher!

:D

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