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Solving for an variable in a denominator (with exponent)  TOPIC_SOLVED

-1/x^2 = -4

I'm totally drawing a blank, and the only posts/lessons I've been able to find involve variables in the numerator.
If it's any help, the answer to this step is:

x^2= 1/4

I know how to solve from there, but this step is killing me. What is the process.

Thanks!
by WB67605
on Sun Feb 19, 2012 6:16 am
 
Forum: Intermediate Algebra
Topic: Solving for an variable in a denominator (with exponent)
Replies: 1
Views: 1522

Re: Solving for an variable in a denominator (with exponent)  TOPIC_SOLVED

Success!

Simply multiply both sides by -x^2 (reciprocal of the fraction) then solve for -1 = -4x^2.

Thanks anyway!
by WB67605
on Sun Feb 19, 2012 6:36 am
 
Forum: Intermediate Algebra
Topic: Solving for an variable in a denominator (with exponent)
Replies: 1
Views: 1522

Adding/Multiplying with exponents  TOPIC_SOLVED

4[(.5)^4(.6)^3] + 4[(.5)^4(.6)^3(.4)] = 4(.3)^3(.7)

I need some help understanding how to come to this answer. Specifically how to keep the answer in exponential form. Certainly if I convert everything I can come up with an answer without an exponent, but that doesn't help in my case.
by WB67605
on Tue Jun 19, 2012 4:24 pm
 
Forum: Arithmetic
Topic: Adding/Multiplying with exponents
Replies: 2
Views: 3195

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