1. (x - 5)(x - 9) = 0, x = 5, 9
2. x(x - 4) = 0, x = 0, 4
3. x(x - 2) = 0, x = 0, 2
4. (x + 5)(x - 3) = 0, x = -5, 3
5. (x + 3)(x - 1) = 0, x = -3, 1
6. (x + 6)(x - 2) = 0, x = -6, 2
7. (x - 3)(x - 5) = 0, x = 3, 5
8. (x - 4)(x - 12) = 0, x = 4, 12
9. (x - 4)² = 0, x = 4
10. (x + 3)(x - 5) = 0, x = -3, 5
1. (x + 2)(x - 2) = 0, x = -2, 2
2. (x - 2)(x - 4) = 0, x = 2, 4
3. (x - 3)(x - 5) = 0, x = 3, 5
4. (x + 2)(x - 6) = 0, x = -2, 6
5. (x + 5)(x + 1) = 0, x = -5, -1
6. (x + 8)(x + 6) = 0, x = -8, -6
7. x(x - 8) = 0, x = 0, 8
8. (x - 3)(x - 11) = 0, x = 3, 11
9. (x - 4)(x - 8) = 0, x = 4, 8
10. (x + 7)² = 0, x = -7
1. 5 ± √(25 + 16) / 4 = 5 ± √41 / 4
2. 7 ± √(49 - 20) / 2 = 7 ± √29 / 2
3. -1 ± √(1 + 96) / 4 = -1 ± √97 / 4
4. 3 ± √(9 + 11) = 3 ± 2√5
5. -1 ± √(1 + 18) / 2 = -1 ± √19 / 2
6. -4 ± √(16 - 4) = -4 ± 2√3
7. 1 ± √(1 + 12) / 6 = 1 ± √13 / 6
8. -3 ± √(9 + 52) / 2 = -3 ± √61 / 2
9. -2 ± √(4 + 2) = -2 ± √6
10. -4 ± √(16 - 14) = -4 ± √2
1. 2 ± √(4 + 14) / 2 = 2 ± 3√2 / 2
2. 3 ± √(9 + 80) / 2 = 3 ± √89 / 2
3. 1 ± √(1 + 32) / 8 = 1 ± √33 / 8
4. 3 ± √(9 - 2) = 3 ± √7
5. 5 ± √(25 + 48) / 6 = 5 ± √73 / 6
6. -5 ± √(25 - 8) / 4 = -5 ± √17 / 4
7. 4 ± √(16 - 13) = 4 ± √3
8. -3 ± √(9 + 14) / 2 = -3 ± √23 / 2
9. -4 ± √(16 - 9) / 3 = -4 ± √7 / 3
10. 4 ± √(16 - 3) / 3 = 4 ± √13 / 3
1. (4x + 3)(x - 4) = 0, (2x + 1)(x - 4) = 0 공통해 x = 4
2. 2(x - 1)(3x + 1) = 0, (x - 2)(3x + 1) = 0 공통해 x = -1/3
3. (6x + 4)(x - 2) = 0, (6x + 4)(2x + 1) = 0 공통해 x = -2/3
4. (2x - 1)(2x - 3) = 0, 4(2x - 1)(x - 1) = 0 공통해 x = 1/2
5. 2(2x + 1)(2x - 1) = 0, 6x(2x+1) = 0 공통해 x = -1/2
6. (x - 3)(4x + 1) = 0, (x + 3)(x - 3) = 0 공통해 x = 3
7. x = -1/2, -2/3
8. 4(x + 1)(x - 1) = 0, (x + 1)(x - 2) = 0 공통해 x = -1
9. (x + 1)(4x - 1) = 0, (x + 1)(x + 3) = 0 공통해 x = -1
10. (2x + 3)(4x + 1) = 0, (2x + 3)(4x + 3) = 0 공통해 x = -3/2
1. (x+1)(2x+3) = 0, (x+3)(2x+3) = 0 공통해 x = -3/2
2. (x - 1)(4x+2) = 0, (x - 1)(4x - 3) = 0 공통해 x = 1
3. 3x(2x - 3) = 0, (3x + 1)(2x - 3) = 0 공통해 x = 3/2
4. (x - 3)(4x + 2) = 0, (x - 2)(x - 3) = 0 공통해 x = 3
5. (x + 3)(4x - 1) = 0, 2(x + 3)(2x + 1) = 0 공통해 x = -3
6. (x + 1)(4x + 1) = 0, 3(x + 1)(x - 1) = 0 공통해 x = -1
7. 2(x + 3)(x - 2) = 0, 2x(x + 3) = 0 공통해 x = -3
8. x = 1, 3
9. 2(x - 2)(2x - 1) = 0, 2x(2x - 1) = 0 공통해 x = 1/2
10. 2(x - 2)(4x + 3) = 0, (4x + 3)(4x - 1) = 0 공통해 x = -3/4