1. -10
2. -9
3. 10
4. 9
-9
1. 7/12
2. 5/12
3. 1/12
4. 1/6
1/12
1. x = 0
2. y = 0
3. x = y
4. x + y = 0
x = 0
1. square but not rhombus
2. rhombus
3. parellelogram
4. rectangle but not a square
parellelogram
1. x2 + y2 + 4x + 8y =0
2. x2 + y2 + 2x + 4y =0
3. x2 + y2 + 8x + 16y =0
4. x2 + y2 + x + y =0
x<sup>2</sup> + y<sup>2</sup> <u>+</u> 4x <u>+</u> 8y =0
1. 3x2 + 3y2 +10y - 3 = 0
2. 3x2 + 3y2 +10y + 3 = 0
3. 3x2 - 3y2 - 10y - 3 = 0
4. x2 + y2 -5y + 3 = 0
3x<sup>2</sup> + 3y<sup>2</sup> +10y + 3 = 0
1. 0
2. -1 - i√3
3. 1 + i√3
4. -1 + i√3
-1 - i√3
1. 1
2. -1
3. 2/3
4. -2/3
-1
1. 2√2
2. √6
3. 2√6
4. √6 + √2
√6 + √2
1. 12
2. √120
3. √20
4. 13
√120