Yo sup??
given points are (-5,0),(0,4) and (2,4)
the given equation is
4x²+4y²+ax+by=0
let us plug in the point (-5,0) in the equation
4*(-5)²+0-5a+0=0
a=20
let us now plug in the point (0,4) in the equation
0+4*4²+0+4b=0
b=-16
therefore the final equation is
4x²+4y²+20x-16y=0
Hope this helps