Question 74221
*[Tex \Large \sqrt{4y}=\sqrt{4}sqrt{y}]The square root of a product can be written as a product of square roots (ie *[Tex \Large \sqrt{xy}=\sqrt(x)\sqrt(y)]
*[Tex \Large \pm 2\sqrt{y}]Since the square root of 4 is 2 and -2 it simplifies to this.