Question

tentukan akar akar persamaan kuadrat dengan cara memfaktorkan

Answer 1

1.
x² + x - 6 = 0
(x + 3)(x -2) = 0

x + 3 = 0
x = -3

x - 2 = 0
x = 2

2.
x² - x - 6 = 0
(x - 3)(x + 2) = 0

x - 3 = 0
x = 3

x + 2 = 0
x = -2

3.
x² + 2x + 1 = 0
(x + 1)² = 0
x + 1 = 0
x = -1

4.
x² - 15x + 14 = 0
(x - 14)(x - 1) = 0

x - 14 = 0
x = 14

x - 1 = 0
x = 1

5.
x² + 5x + 6 = 0
(x + 3)(x + 2) = 0

x + 3 = 0
x = -3

x + 2 = 0
x = -2

6.
x² + 2x - 15 = 0
(x + 5)(x- 3) = 0

x + 5 = 0
x = -5

x - 3 = 0
x = 3

7.
x² + 4x - 12 = 0
(x + 6)(x - 2) = 0

x + 6 = 0
x = -6

x - 2 = 0
x = 2

8.
x² - 3x - 4 = 0
(x - 4)(x + 1) = 0

x - 4 = 0
x = 4

x + 1 = 0
x = -1