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another maths question
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sergeant Offline

Posts: 115
Joined: Aug 2011
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Post: #9
RE: another maths question

sqrt(t) = 4 + 12/sqrt(t)

Multiply both sides by sqrt(t)

t = 4sqrt(t) + 12

Subtract 12 from both sides (you're isolating the root)

t - 12 = 4sqrt(t)

Square both sides

t^2 - 24t +144 = 16t

Subtract 16t from both sides

t^2 - 40t + 144 = 0

Now you have a quadratic equation. HIDDEN QUADRATIC

36, 4

If you input 4 you will realize it is the opposite of the root and it won't work. Square roots refer only the the positive number which when squared equals the original. Oh well.

36 = t
(This post was last modified: 10-23-2011 07:00 AM by sergeant.)
10-23-2011 06:59 AM
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Messages In This Thread
another maths question - Elfy - 10-20-2011, 04:08 AM
RE: another maths question - Aya - 10-20-2011, 04:43 AM
RE: another maths question - Elfy - 10-20-2011, 04:57 AM
RE: another maths question - Prince Rilian - 10-21-2011, 10:17 AM
RE: another maths question - sergeant - 10-21-2011, 11:39 AM
RE: another maths question - Elfy - 10-21-2011, 02:15 PM
RE: another maths question - Prince Rilian - 10-21-2011, 02:52 PM
RE: another maths question - Efs - 10-23-2011, 06:28 AM
RE: another maths question - sergeant - 10-23-2011 06:59 AM

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