2y^2+5x=0→2y^2=-5x→y^2=-(5/2)x-2p=-5/2→p=5/4抛物线的焦点坐标为：F(-5/8,0)准线方程为：x=p/2→x=5/8x^2+8y=0→x^2=-8y-2p=-8→p=4抛物线的焦点坐标为:F(0,-2)准线方程为:y=p/2→y=2
