Panel of Experts

Karl Schellscheidt

SAT Prep Expert

  • BSE, Princeton University '90
  • M.A., Secondary Education Seton Hall University '93
  • J.D., University of Pennsylvania Law School '00

Fred Hargadon

Dean of Admission

  • Swarthmore College
    (1964-1969)
  • Stanford University
    (1969-1984)
  • Princeton University
    (1988-2003)

Don Betterton

Financial Aid Expert

  • Director of Financial Aid, Princeton University (1973-2006)
  • Certified College Planner
  • Principal, Betterton College Planning

Seamus Malin

Admission Expert

  • Harvard University
    Dir. of Financial Aid
    (1966-1977)
    Asst. Dean of Admission
    (1977-1987)
    International Office Director
    (1987-2002)

SAT Tip of the Day

Math  SAT
Karl Schellscheidt

eprep test prep video Most students know the distributive property:

a(b + c) = ab + ac

Here’s an example that involves distributing, however, that I’ve seen many students mess up.

The wrong way:

(x + 3) – (3x + 4) = x + 3 – 3x + 4 = -2x + 7

The right way:

(x + 3) – (3x + 4) = x + 3 – 3x – 4 = -2x – 1

For some reason, when there is a negative outside the parenthesis, many students (under the pressure of a timed test) forget to distribute the negative. If you stay conscious of this common pitfall, you are sure to avoid an “avoidable” error on the SAT. Good luck!

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