add math question

Quote:

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Originally Posted by 01101101entor

Just to check is lack of sleep catching up on me or are you actaly boro, as it kinda sounded like that in ya post if it was me which is why i asked "/

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Me and boro posted the same thing lol

Quote:

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Originally Posted by doraemonkiller

logxY + logyX =5/2
how to do this then ?!

this is not algebra everyone ,is log

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Since google was not doing what i wanted it to, and i dont have a calc on me, and ive never actaly done logorthums before now, i quickly learnt it of here
http://sage.mc.yu.edu/kbeen/teaching...ogarithms.html
(kinda helped by google for that)

Basicaly all it is, is setting a base then working out what number is needed in that base to give the second number :D

Quote:

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Originally Posted by TealArms

Me and boro posted the same thing lol

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Ah ok? just a side effect of me being to lazy to read more than 1 or 2 posts in the thread then :D

I have an easier maths question

FACTORISING QUADRATICS (GRADE C WORK) EASY :)

x = letter x X = Multiply

x (squared) (x X x) - 16x + 63 =




answer down below --------->








Factors of 63 = 1,63 3,21 7,9
x(squared) - 16x + 63
Factors 7,9 add up to 16(x)
Answer = (x-7) (x+9)
Complicated if you dont understand it .

thx for the answer

Quote:

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Originally Posted by 01101101entor

You wana guess what the second bit is actaly for now?

Theres a reason i droped maths, to much thinking but anyway

Premis
xy=27 and logxY + logyX =5/2

Exsplination
What we know
X*Y = 27

And
logxY + logyX =5/2
5 dived by 2 is 2.5 so

log X Y + log Y X = 2.5

Like boro Got, we can take a guess at what X and Y could be, we then run em threw the second equasion to figure out which is which.

Hypthetoicaly
If
x = 9
y = 3

log9 3 + log3 9 = 2.5

Note: google cant do logorthums, :( i actaly have to think dag nabit

first of
log(3)9 = 2
log(9)3 = 0.5

2.5 is the correct answer no?

Answer

Then
X = 9
Y = 3

theres the answer to your math homework :D

(warning, im prone to dodgy maths and stupid yet obvios errors on the most simplic part of sums so u may wana double check all that

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Quote:

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Originally Posted by RlC

I have an easier maths question

FACTORISING QUADRATICS (GRADE C WORK) EASY :)

x = letter x X = Multiply

x (squared) (x X x) - 16x + 63 =




answer down below --------->








Factors of 63 = 1,63 3,21 7,9
x(squared) - 16x + 63
Factors 7,9 add up to 16(x)
Answer = (x-7) (x+9)
Complicated if you dont understand it .

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Why exsactly are you posting this if you dont need help with it "/

Plus
* = multiply
x = letter
There standard symboles...