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

Redeem
TTP OnDemand GMAT Video Course
Featured Course

Target Test Prep GMAT OnDemand

Scott Woodbury-Stewart’s private virtual classroom — 400 hours of master-class video lessons for the GMAT Focus Edition.

  • 715+ score guarantee — highest in the industry (99th percentile)
  • 52 chapters · 1,500+ lessons · 4,000+ practice questions
  • 400 hours of video · 1,500+ instructor-led HD smartboard lessons
  • 300,000+ students accepted to Harvard, Stanford, Wharton, Booth & Sloan & more
  • 24/7 live support + weekly Zoom office hours with GMAT instructors
  • TTP AI Assist — 24/7 AI-powered virtual tutor for instant help
  • 1,200+ flashcards + AI-powered study assistant & daily calendar
  • OnDemand, LiveTeach & GMAT Bootcamp formats available
  • Also: GRE, SAT Math & Executive Assessment courses
  • MBA Admissions Consulting now available
  • 🏆 2025 EdTech Breakthrough Award: Test Prep Solution Provider of the Year
  • 200,000+ students served
  • 5-day free trial — $0 to start, no auto-billing, cancel anytime
★★★★★ 5.0 (559 reviews)
130-pt guarantee
$0 to start then $127/mo
Start Free 5-Day Trial Read 559 Reviews →

SQRT(x) = 25, then x^3-x^2 = ?

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Newbie | Next Rank: 10 Posts
Posts: 5
Joined: Mon Apr 12, 2010 4:47 am
Thanked: 1 times
by PANJIEMING » Tue Apr 13, 2010 2:43 am
Hi I still suck with exponents...

SQRT(x) = 25, then x^3-x^2 = ?

A. 5^12
B. 5^20
C. 6(6^5)
D. 5^4(5^2+1)
E. 5^8(5^4-1)

The anser is E and I don't get how you can get there from 625^3-625^2 - pl shelp. THANKS
Top
Join the discussion
Log increate an account to reply.
Source: — Problem Solving |
Junior | Next Rank: 30 Posts
Posts: 19
Joined: Tue Apr 06, 2010 1:07 am

by gmat.cracker24 » Tue Apr 13, 2010 3:12 am
sqrt(x)=25=5^2
x=5^4
x^2=5^8
x^3=5^12
x^3-x^2=5^12-5^8
=5^8(5^4-1)
Top
Join the discussion
Log increate an account to reply.
User avatar
Legendary Member
Posts: 1560
Joined: Tue Nov 17, 2009 2:38 amFollowed by: 5 members
Thanked: 137 times

by thephoenix » Tue Apr 13, 2010 3:18 am
The anser is E and I don't get how you can get there from 625^3-625^2 - pl shelp. THANKS
625^3-625^2=(5^4)^3-(5^4)^2=5^12-5^8=5^8(5^4-1)
Top
Join the discussion
Log increate an account to reply.
Post new topic Post Reply
• Page 1 of 1