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

Redeem

why is this so hard to me today

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Source: — Problem Solving |
Senior | Next Rank: 100 Posts
Posts: 42
Joined: Wed Jun 20, 2007 8:45 am
Thanked: 1 times

solution

by tutonaranjo » Tue Feb 05, 2008 7:30 pm
hey... you can't subtract exponents with the same base.
All you could do is factor out like this

2^4 *2^5 / 2^7-2^4 =

2^9/2^4(2^3 - 1) = (factored 2^4 in the denominator)

2^5/(2^3 - 1) = you can only subtract exponents when they are divided
Top
Master | Next Rank: 500 Posts
Posts: 222
Joined: Fri Jan 04, 2008 8:10 pm
Thanked: 15 times

by sibbineni » Wed Feb 06, 2008 3:58 am
I think the question is

(2^4*2^5/2^7)-2^4

(2^9/2^7)-2^4

2^2-2^4

4-16

=-12
Top
Post new topic Post Reply
• Page 1 of 1