Math Help Forum - View Single Post

earboth · #4 December 3rd, 2008, 01:16 AM

Quote:

Originally Posted by shiel8

for the second questions it's 2+y under squareroot symbol minus 2-y under squareroot symbol all over y

how do you enter info in the format you're using? It'd be much easier to post if I knew how to do that.

Have a look here: http://www.mathhelpforum.com/math-he...-tutorial.html

Use a factor such that you get a sum of squares in the denominator:

$\dfrac{\sqrt{5x} - 6}{\sqrt{5x} + 3}=\dfrac{\sqrt{5x} - 6}{\sqrt{5x} + 3} \cdot \dfrac{\sqrt{5x} - 3}{\sqrt{5x} - 3}= \dfrac{5x-9\sqrt{5x} +18}{5x-9}$