Free GRE Practice Questions

Question 1 of 1
ID: GRE-SMQ-17
Section: Quantitative Reasoning - Multiple Choice with one or more answer
Topics: Geometry; Quadrilateral
Difficulty level: Challenging

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Which of the following expressions are positive for all possible values of $x$?

Indicate all such expressions.

[ Note: Select one or more answer choices ]

A$x^2+6x+8$
B$x^2+4x+6$
C$2x^2+8x+10$
D$2x^2+16x+32$