03-2-2008, 02:19 AM | #1 |
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[High School - Algebra] Quadratic Equations
I need help with this question. I'm not sure how to start it off. Any help will be greatly apperciated:
Find the solutions to the following equation algebraically, and verify your solution(s). 0 = 3 - squareroot (x-3)
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03-2-2008, 02:32 AM | #2 |
the baker man
Join Date: Jun 2007
Location: merryland
Age: 30
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Re: High school Jr. Algebra Quadratic Equations
I'M REALLY BORED.
Step 1: 0=3-sqrt(X-3) Subtract 3 from both sides. Step 2: -3=-sqrt(X-3) Square both sides. Step 3: 9=-X+3 Subtract 3 from both sides. Step 4: 6=-X Multiply both sides by -1 to find X. X=-6 This is probably right lol. EDIT: Lol, I took this last year in 7th grade. Last edited by dandandamdandan1111; 03-2-2008 at 02:35 AM.. |
03-2-2008, 02:53 AM | #3 |
caveman pornstar
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Re: High school Jr. Algebra Quadratic Equations
dunno where you got that negative in step 3
0=3-sqrt(x-3) -3=-sqrt(x-3) 9=x-3 12=x
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03-2-2008, 02:56 AM | #4 |
smoke wheat hail satin
Join Date: Sep 2006
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Age: 35
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Re: High school Jr. Algebra Quadratic Equations
Hahaha, I was looking at dan's work and I was like...oooh! There's an i! How excit - oh. He did it wrong.
DJ_Okami, just to clarify, dore's post is the correct answer. |
03-2-2008, 09:55 AM | #5 |
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Re: [High School - Algebra] Quadratic Equations
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03-2-2008, 12:30 PM | #6 |
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Re: [High School - Algebra] Quadratic Equations
Here's a bit of a more in-depth explanation
0 = 3 - root(x-3) ------------ Given in problem -3 = -root(x-3) ------------ Subtract three from each side 9 = x-3 --------------------- Square each side (the -root is irrelevant in terms of squaring, as it just denotes the negative square root rather than the positive, and ends up squaring to the same thing) 12 = x ---------------------- Add three to both sides. |
03-2-2008, 12:32 PM | #7 |
the baker man
Join Date: Jun 2007
Location: merryland
Age: 30
Posts: 2,176
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Re: [High School - Algebra] Quadratic Equations
Lol. I had 12 as my first answer, then I did it and got -6 for some reason. If I had done it on paper, I probably would've gotten it.
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03-2-2008, 01:13 PM | #8 |
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Re: [High School - Algebra] Quadratic Equations
thanks guys, i suck at math...
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