SOLUTION: This is the solving using the quadratic formula I know how to solve this and everything but I can't get the right simplified ANSWER. Can you help? (x+4)^2=15-2x^2

Algebra ->  Quadratic Equations and Parabolas -> SOLUTION: This is the solving using the quadratic formula I know how to solve this and everything but I can't get the right simplified ANSWER. Can you help? (x+4)^2=15-2x^2      Log On


   

Question 762416: This is the solving using the quadratic formula
I know how to solve this and everything but I can't get the right simplified ANSWER.
Can you help?
(x+4)^2=15-2x^2
Found 2 solutions by solver91311, Cromlix:
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!


Sure. Share the answer that you did get and lets work together on simplifying it.

I'll give you a hint though. 52 = 4 * 13

John

Egw to Beta kai to Sigma
My calculator said it, I believe it, that settles it
The Out Campaign: Scarlet Letter of Atheism

Answer by Cromlix(4381) About Me  (Show Source):
You can put this solution on YOUR website!
(x + 4)^2 = 15 - 2x^2
x^2 + 8x + 16 = 15 - 2x^2
3x^2 + 8x + 1 = 0
Using
x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+
x+=+%28-8+%2B-+sqrt%28+8%5E2-4%2A3%2A1%29%29%2F%282%2A3%29+
x+=+%28-8+%2B-+sqrt%28+52+%29%29%2F%286%29+
x = -8 +- 7.2/6
x = -15.2/6 or x = -0.8/6
x = -2.53 or x = -0.13
Hope this helps.
:-)