Homework Help: algebra

Posted by sue on Monday, October 25, 2010 at 9:00pm.

I get confused when solving for some of the fractions in my problem. how would you solve for 1+(-2/(sqroot 5))? I just need a refresher on the order of operations for it. Thanks!

algebra - jai, Tuesday, October 26, 2010 at 1:10am
when you have a term squareroot (for example sqrt(x))in the denominator, multiply it with itself such that the multiplier is equal to one ( sqrt(x)/sqrt(x) ) to remove the squareroot,, in this problem:
1+(-2/(sqroot 5))
1+(-2/(sqroot 5))*(sqrt(5)/sqrt(5))
1+{[-2*sqrt(5)]/5}
therefore:
{[5-2*sqrt(5)]/5}

so there,, :)

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