1. 2x-y-3=0
2. 2x+y-5=0
3. 2x+y-4=0
4. 2x+y+3=0
2x+y-5=0
1. 4
2. 3
3. 2
4. 1
2
1. -20
2. 10
3. 20
4. -10
10
1. 2x2+2y2+gx+fy=0
2. 2x2+2y2-gx-fy=0
3. x2+y2+gx+fy=0
4. x2+y2-gx-fy=0
2x2+2y2+gx+fy=0
1. √(5/2)
2. 3√10
3. 2√5
4. √5
3√10
1.
2.
3.
4.
1. 3
2. -6
3. 6
4. -3
3
1. π/6
2. π/4
3. π/3
4. π/2
π/2
1. 60
2. 20
3. 40
4. 10
20
1. 4
2. 3
3. 2
4. 1
3