直角的顶点在原点,y1=2x,K1=2 k2=-1/2,y2=-1/2x,
4x²=2Px,2x=p,x1=p/2,y1=p,
x²/4=2px,x2=8p,y2=4p,
p²/4+P²+64p²+16p²=65,
325p²=65*4
5p²=4,
p=2√5/5
此抛物线方程:y²=4√4/5*x