# Inequalities and Surds - dying of confusion over this question.

• Sep 19th 2010, 12:34 PM
Code2004
Inequalities and Surds - dying of confusion over this question.
Hi, I've been staring at this question on my 'homework' sheet for ages, and after... So long, I decided I need help. If possible, could someone solve the question and explain the process quickly please ^^!?

sqrt(2)*(x-sqrt(2)) < x+(2*sqrt(2))

Any help would be appreciated. I apologise if this is easy.

Code2004
• Sep 19th 2010, 12:43 PM
skeeter
Quote:

Originally Posted by Code2004
Hi, I've been staring at this question on my 'homework' sheet for ages, and after... So long, I decided I need help. If possible, could someone solve the question and explain the process quickly please ^^!?

sqrt(2)*(x-sqrt(2)) < x+(2*sqrt(2))

Any help would be appreciated. I apologise if this is easy.

Code2004

$\displaystyle \sqrt{2} (x - \sqrt{2}) < x + 2\sqrt{2}$

$\displaystyle \sqrt{2} \cdot x - 2 < x + 2\sqrt{2}$

$\displaystyle \sqrt{2} \cdot x - x < 2 + 2\sqrt{2}$

$\displaystyle x(\sqrt{2} - 1) < 2(1 + \sqrt{2})$

$\displaystyle x < \frac{2(1+\sqrt{2})}{\sqrt{2}-1}$
• Sep 19th 2010, 12:45 PM
Code2004
You're a star, I love you.