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#26 2011-06-12 20:46:50
Re: Official Algebra Topic
JJROCKER wrote:
Harakou wrote:
kayybee wrote:
4^2^4=4,294,967,296
I got one that's pretty simple but harder than previous ones:
(x+1)(x+1)=9
Solve for x.x = 2
3x^2 + 6x + 6 = 0bbbeb thinks its 8 but we think its 2. Mind helping?
Sure!
Code:
(x + 1)(x + 1) = 9 (x + 1)^2 = 9 sqrt((x + 1)^2) = sqrt(9) x + 1 = 3 x = 2
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#27 2011-06-12 20:48:40
Re: Official Algebra Topic
Harakou wrote:
JJROCKER wrote:
Harakou wrote:
x = 2
3x^2 + 6x + 6 = 0bbbeb thinks its 8 but we think its 2. Mind helping?
Sure!
Code:
(x + 1)(x + 1) = 9 (x + 1)^2 = 9 sqrt((x + 1)^2) = sqrt(9) x + 1 = 3 x = 2
Yeah, plus...
(2+1)(2+1)
(3)(3)=9
x=9
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#28 2011-06-12 20:50:48
Re: Official Algebra Topic
bbbeb wrote:
JJROCKER wrote:
kayybee wrote:
4^2^4=4,294,967,296
I got one that's pretty simple but harder than previous ones:
(x+1)(x+1)=9
Solve for x.X=2 and I will add it to the list
no
x = 8
tyvm
(2x-3)(4x+2)=0
I'm fairly confident it's NOT 2. We learned that you split it into equations to get it.
x+1=9,x+1=9
x = 8
FOIL
x^2+2x+1=9
x^2+2x=8
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#29 2011-06-12 20:54:17
Re: Official Algebra Topic
kayybee wrote:
bbbeb wrote:
JJROCKER wrote:
X=2 and I will add it to the listno
x = 8
tyvm
(2x-3)(4x+2)=0
I'm fairly confident it's NOT 2. We learned that you split it into equations to get it.
x+1=9,x+1=9
x = 8FOIL
x^2+2x+1=9
x^2+2x=8
I don't think so. That does not make sense. Plug it in.
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#30 2011-06-12 21:00:31
Re: Official Algebra Topic
bbbeb wrote:
JJROCKER wrote:
kayybee wrote:
4^2^4=4,294,967,296
I got one that's pretty simple but harder than previous ones:
(x+1)(x+1)=9
Solve for x.X=2 and I will add it to the list
no
x = 8
tyvm
(2x-3)(4x+2)=0
I'm fairly confident it's NOT 2. We learned that you split it into equations to get it.
x+1=9,x+1=9
x = 8
That only works if the opposite side of the equation is 0. XD
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#31 2011-06-12 21:04:40
Re: Official Algebra Topic
JJROCKER wrote:
kayybee wrote:
bbbeb wrote:
no
x = 8
tyvm
(2x-3)(4x+2)=0
I'm fairly confident it's NOT 2. We learned that you split it into equations to get it.
x+1=9,x+1=9
x = 8FOIL
x^2+2x+1=9
x^2+2x=8I don't think so. That does not make sense. Plug it in.
I just forgot my factoring so I can't continue.
But 2^2+2(2)=8...
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#32 2011-06-12 21:18:39
Re: Official Algebra Topic
Harakou wrote:
bbbeb wrote:
JJROCKER wrote:
X=2 and I will add it to the list
no
x = 8
tyvm
(2x-3)(4x+2)=0
I'm fairly confident it's NOT 2. We learned that you split it into equations to get it.
x+1=9,x+1=9
x = 8That only works if the opposite side of the equation is 0. XD
Yeah, I am almost positive 2 is correct.
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#35 2011-06-12 21:59:58
Re: Official Algebra Topic
JJROCKER wrote:
Harakou wrote:
For number 4, x = -0.5 and x = 1.5.
Mind explaining?
Absolutely.
Code:
(2x - 3)(4x + 2) = 0 (2x - 3) = 0 OR 4x + 2 = 0 2x = 3 4x = -2 x = 1.5 x = -0.5
Last edited by Harakou (2011-06-12 22:00:41)
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#36 2011-06-12 22:01:28
Re: Official Algebra Topic
Harakou wrote:
JJROCKER wrote:
Harakou wrote:
For number 4, x = -0.5 and x = 1.5.
Mind explaining?
Absolutely.
Code:
(2x - 3)(4x + 2) = 0 (2x - 3) = 0 OR 4x + 2 = 0 2x = 3 4x = -2 x = 1.5 x = -0.5
Ok, thanks so much, I see
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#37 2011-06-12 22:03:18
Re: Official Algebra Topic
kayybee wrote:
bbbeb wrote:
JJROCKER wrote:
X=2 and I will add it to the listno
x = 8
tyvm
(2x-3)(4x+2)=0
I'm fairly confident it's NOT 2. We learned that you split it into equations to get it.
x+1=9,x+1=9
x = 8FOIL
x^2+2x+1=9
x^2+2x=8
Sorry. I thought it was 8. 
My Algebra knowledge is flawed.... D:
Back in my day.... there were no laws that censored the internet... now, there are.... nah.
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#38 2011-06-12 22:05:51
Re: Official Algebra Topic
bbbeb wrote:
kayybee wrote:
bbbeb wrote:
no
x = 8
tyvm
(2x-3)(4x+2)=0
I'm fairly confident it's NOT 2. We learned that you split it into equations to get it.
x+1=9,x+1=9
x = 8FOIL
x^2+2x+1=9
x^2+2x=8Sorry. I thought it was 8.
My Algebra knowledge is flawed.... D:
Well also plug in your answers to see if they are correct. That helps.
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#39 2011-06-12 22:06:48
Re: Official Algebra Topic
JJROCKER wrote:
bbbeb wrote:
kayybee wrote:
FOIL
x^2+2x+1=9
x^2+2x=8Sorry. I thought it was 8.
My Algebra knowledge is flawed.... D:Well also plug in your answers to see if they are correct. That helps.
I noticed when I got 8, i was like 81 =/ 9, whatisthis?
Back in my day.... there were no laws that censored the internet... now, there are.... nah.
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#40 2011-06-12 22:13:26
Re: Official Algebra Topic
My answers...
8^2 64
2^2^2 16
8! 40,320
(2x-3)(4x+2)=0 x=1.5,-0.5
(x+1)(x+1)=9 x=2
3x^2 + 6x + 6 = 0 Not possible I believe, got stuck on (6 (+ or -) sqrt (-36) )/ 6
What is an equation? 1 + 1 = 2
Simple enough
Last edited by bbbeb (2011-06-12 22:14:06)
Back in my day.... there were no laws that censored the internet... now, there are.... nah.
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#46 2011-06-12 22:50:59
Re: Official Algebra Topic
JJROCKER wrote:
I don't know the answer myself
Spoiler (Highlight for solution):
3x^2 + 6x + 6 = 0
(3x^2 + 6x + 6)/3 = 0/3
x^2 + 2x + 2 = 0
x^2 + 2x = -2
x^2 + 2x + 1 = -2 + 1
(x + 1)^2 = -1
sqrt((x + 1)^2) = sqrt(-1)
x + 1 = i
x = i - 1
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#47 2011-06-12 22:52:26
Re: Official Algebra Topic
Harakou wrote:
JJROCKER wrote:
I don't know the answer myself
Spoiler (Highlight for solution):
3x^2 + 6x + 6 = 0
(3x^2 + 6x + 6)/3 = 0/3
x^2 + 2x + 2 = 0
x^2 + 2x = -2
x^2 + 2x + 1 = -2 + 1
(x + 1)^2 = -1
sqrt((x + 1)^2) = sqrt(-1)
x + 1 = i
x = i - 1
Thanks for explaining.
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