X^2 = 16, Y^2 = 9 and XY = -12. What is the value of 12 (X + Y)^2 ?

# TJ Prep Problems

TJ test prep practice problems for our students and readers. The problems provide a very small sampling of what Optimal TJ Prep students work with.

"Outsmarting the Competition" - The Washington Post, 2001. (Hundreds of students accepted to TJ since 1994)

TJ test prep practice problems for our students and readers. The problems provide a very small sampling of what Optimal TJ Prep students work with.

X^2 = 16, Y^2 = 9 and XY = -12. What is the value of 12 (X + Y)^2 ?