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Need help on this Simplification of ALgebra  TOPIC_SOLVED

the below is to be simplify to 2/3X^2 but i just can't get it -:(
(R^2)/4 * (3x)^R * (2/9x^2)^(6-R) = 2/3X^2 -- proof it (R is eventually eliminated- how ??)

main obstacles is i can't get rid of the ^R, pls help
by cls
on Fri Jan 13, 2012 5:31 pm
 
Forum: Beginning Algebra
Topic: Need help on this Simplification of ALgebra
Replies: 5
Views: 2052

Re: Need help on this Simplification of ALgebra  TOPIC_SOLVED

Hi, thank you for your reply--
x=X, sorry for the typo.

The recent topic learnt is Exponential Equation.
the complete question is as follow -

If (R^2)/4 * (3X)^R * (2/9X^2)^(6-R) can be simplified to K/X^3 , find the values of the constants R and K.

(answer R=3, K=2/3)
by cls
on Sat Jan 14, 2012 1:18 am
 
Forum: Beginning Algebra
Topic: Need help on this Simplification of ALgebra
Replies: 5
Views: 2052

Re: Need help on this Simplification of ALgebra  TOPIC_SOLVED

we have not learn Logarithms, so i can only try to use method like isolating exponent etc, but no luck :<
by cls
on Sat Jan 14, 2012 1:43 am
 
Forum: Beginning Algebra
Topic: Need help on this Simplification of ALgebra
Replies: 5
Views: 2052

Re: Need help on this Simplification of ALgebra  TOPIC_SOLVED

Thank you for the great help !!
so i work out as -
X^(R-2(6-R)) = X^-3
R-12+2R=-3
3R=9
R=3 :clap:

and K can then be solved !!! :clap:
by cls
on Sat Jan 14, 2012 7:14 am
 
Forum: Beginning Algebra
Topic: Need help on this Simplification of ALgebra
Replies: 5
Views: 2052

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