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## Comment on

“Fixing” the Denominator## I think rather than using

## I totally agree that that

I totally agree that that would save time.

I don't mention the Difference of Squares approach (found here https://www.gmatprepnow.com/module/gmat-algebra-and-equation-solving/vid...), because many students follow the course as it's laid out in the Learning Guide, and those students haven't covered that lesson yet.

## For the second question, why

-Yvonne

## That's totally valid. However

That's totally valid. However, once we get to (2√50)/15, we need to recognize that we can simplify this fraction further, since √50 = √(25 x 2) = √25 x √2 = 5√2

So, (2√50)/15 = 2(5√2)/15 = 2√2/3

## Reinforcement activity #3

## Good catch - thanks!

Good catch - thanks!

I have removed one of the duplicate links.

Cheers,

Brent

## Add a comment