I really need help!!!!!!!!!!!:(
Solve for x: 8x2 + 64x = 0

Question

I really need help!!!!!!!!!!!:(
Solve for x: 8x2 + 64x = 0

anonymous · Answer

i will give medals

anonymous · Answer

Calculate it!
8x(2)+64x=0
I will try to solve your equation.
80x=0(Simplify both sides of the equation)
(80x) over 80 = 0 over 80 (Divide both sides by 80)
x=0

anonymous · Answer

Please give medals and fan me if this helped! :D

anonymous · Answer

I got x=0 ad x=-8 is that right? because you just gave me the part of the answer ??

anonymous · Answer

Yes, x does = 0

anonymous · Answer

what about x=-8 did I get that part right?

anonymous · Answer

But not -8.

anonymous · Answer

You can try it

anonymous · Answer

why not -8

anonymous · Answer

Is the 8x2 supposed to be an 8x^2?

anonymous · Answer

Now, if the equation was: 8x2 + 64x = then it would be =80x

anonymous · Answer

i took a test and it said that the answer was  x=0 and x=-8 i am just trying to figure out why

anonymous · Answer

Hmm.....I don't understand why it says that. Do you have a copy by any chance?

anonymous · Answer

yeah here was the question and options 
Solve for x: 8x2 + 64x = 0 (2 points)
 		
		x = 0, x = -8
		x = 0, x = 8
	x = -8, x = 0, x = 8
	x = 8, x = 64

anonymous · Answer

Like a screen capture of link

anonymous · Answer

Try -8.why did you make it positive?

anonymous · Answer

yeah

anonymous · Answer

Do you do Laurel Springs?

anonymous · Answer

That is weird.......maybe the class teaches it differently

anonymous · Answer

I do Florida virtual

anonymous · Answer

Oh. I am in Florida and do online school! :D It seemed familiar but I do Keystone National Online School

anonymous · Answer

so what do you think?

anonymous · Answer

acacia, how many ways of solving a quadratic do you know?

anonymous · Answer

Sorry I can only get x=0 :(

anonymous · Answer

well i do this program but i live in Oregon

anonymous · Answer

umm 4 ways i think

anonymous · Answer

Which one do you think would be the best for this equation?

anonymous · Answer

the one where you use this formula  x=−b +/− √b2−4ac  /2a

anonymous · Answer

Okay, so in this case a=8,b=64,and c=0
you can substitute these into the equation and solve for x

anonymous · Answer

ok I got it thanks so much i will give you a medal and a fan!

anonymous · Answer

You're welcome. Would you like to see the other ways that might have worked?

anonymous · Answer

no I think I got it thanks thou by!!