Find the product of (2(sqrt{y – 3y})) and (3y = 2y)

A.
4y = y^{2} 
B.
4y + 9y^{2} 
C.
4y – 9y^{2} 
D.
4y – 9y^{2} 
E.
2y + y^{2}
Correct Answer: Option C
Explanation
(2(sqrt{y – 3y}))(3y = 2y)
= 6y y + 4y – 9y^{2} – 6y(sqrt{y})
= 4y – 9y^{2}