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

Redeem

Fractions

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Source: — Data Sufficiency |
GMAT Instructor
Posts: 2630
Joined: Wed Sep 12, 2012 3:32 pm
Location: East Bay all the way
Thanked: 625 times
Followed by:119 members
GMAT Score:780

by Matt@VeritasPrep » Fri Sep 25, 2015 11:03 am
Since p ≠ 0 (otherwise we couldn't divide by p), we can multiply the entire equation by p, giving

Is a(p² + r² + s²) = ap² + brp + csp ?

or

Is ap² + ar² + as² = ap² + brp + csp ?

or

Is ar² + as² = brp + csp ?


S1 tells us that cp = as, which means that the RED terms are equal.

S2 tells us that ar = bp, which means that the BLUE terms are equal.

And from there we're good to go!
Top
Post new topic Post Reply
• Page 1 of 1