設(shè)拋物線方程為：y^2=2px 焦點(diǎn)：(p/2,0)
經(jīng)過焦點(diǎn)且傾角為135°的直線:y=-x+p/2
y^2=2px y=-x+p/2 聯(lián)立得：x1=(3-2√2)p/2 x2=(3+2√2)p/2 y1==(-1+2√2)p/2 y2=(-1-2√2)p/2
8p^2+8p^2=8^2 p=2
拋物線方程為：y^2=4x