How many real roots does the equation x^2y+15xy+64y=0 have if y < 0? Choose the correct choice from the following answers:
A) 0
B) 1
C) 2
D) 3
E) Infinite
x^2y+15xy+64y=0   =&gt; y ( x^2 + 15x + 64) = 0   =&gt; y (x+8)^2 = 0   if y&lt;0 , then x=-7   So although there are 2 factors , they are the same x=-7 .   The equations has 2 distinct real root .   Answer 2
<result>C</result>
How many real roots does the equation x^2y+15xy+64y=0 have if y < 0?