GRE

$$4x^{2}+1$$

$$(2x+1)^{2}$$

a

b

The percent of type S cars that do not contain anti-theft devices.

45%

AB

BC

$$\frac{(3a)(3a)}{3}$$

$$\frac{3a+3a}{3}$$

A length of a side of the square

$$x^{2}-1$$

The ratio of the number students enrolled in German classes to the number of students enrolled in Spanish classes

$$\frac{3}{4}$$

$$(\frac{y}{x})\sqrt{\frac{x^{3}}{y}}$$

$$\sqrt{xy}$$

The area of the square

The perimeter of the square

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