Question

If one of the Line & given by
2x² + 5xy + cy²=0 is x + 2y = 0, then C equals​

Answer 1

Answer:

from x+2y=0 we can say that x=-2y

then 2(-2y)^2+5(-2y)y+cy^2=0

or,-4y^2-10y^2+cy^2=0

or,-14y^2+cy^2=0

or,y^2(-14+c)=0

or,c-14=0

:.c=14

Step-by-step explanation: