Q1:已知L1和L2互为垂直并且相交于点(4 3) 1：L1 过点（2 4）.求L1方程2：求L2的斜率3：写出L2的方程.Q2:a:Find the coordinates of the focus of the parabola y=X^2=X^2+8X+6B:find the equation of the parabola woth focus (2,3 and

Q1:已知L1和L2互为垂直并且相交于点(4 3) 1：L1 过点（2 4）.求L1方程2：求L2的斜率3：写出L2的方程.Q2:a:Find the coordinates of the focus of the parabola y=X^2=X^2+8X+6B:find the equation of the parabola woth focus (2,3 and
Q1:
已知L1和L2互为垂直并且相交于点(4 3)
1：L1 过点（2 4）.求L1方程
2：求L2的斜率
3：写出L2的方程.
Q2:
a:Find the coordinates of the focus of the parabola y=X^2=X^2+8X+6
B:find the equation of the parabola woth focus (2,3 and directrix y=-1..

Q1:已知L1和L2互为垂直并且相交于点(4 3) 1：L1 过点（2 4）.求L1方程2：求L2的斜率3：写出L2的方程.Q2:a:Find the coordinates of the focus of the parabola y=X^2=X^2+8X+6B:find the equation of the parabola woth focus (2,3 and
1.1.L1方程 y＝（-1/2）（x-4）+3
1.2.L2的斜率＝2.
1.3.L2的方程.y＝2（x-4）+3
2.a.y=X^2+8X+6.（y+10）＝（x+4）².
The coordinates of the focus :F（-4.-39/4）
2,b The equation of the parabola:
（x-2）²+（y-3）²＝（y+1）² or y＝（1/8）（x-2）²+1 .