BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

Difference of two functions

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Source: — Problem Solving |
Newbie | Next Rank: 10 Posts
Posts: 3
Joined: Sat May 24, 2008 2:33 am
Location: India

by Mavin » Sat May 24, 2008 5:24 am
The answer is 2ab.

On substituting 'b' all other terms will be cancelled except 'ax'.

This will be:

a(b) - a(-b) = 2ab

Hope this helps.
Top
User avatar
Legendary Member
Posts: 566
Joined: Fri Jan 04, 2008 11:01 am
Location: Philadelphia
Thanked: 31 times
GMAT Score:640

by AleksandrM » Sat May 24, 2008 11:19 am
Yup. Thanks. I tried it tried it again while doing a bunch of problems from the OG and realized that I overlooked the squaring, which makes -b positive. Have to be more careful.
Top
Post new topic Post Reply
• Page 1 of 1