Jawaban:
1. -2 atau -6
2. -5 atau 4
3. -½ atau -3
4. -1¼ atau 0
5. -2 atau 2
6. 8 atau 0
Penjelasan dengan langkah-langkah:
1. x² + 8x + 12 → faktorkan
(x + 2) (x + 6) = 0
x + 2 = 0
x = -2
atau
x + 6 = 0
x = -6
2. x² + x - 20
(x + 5) (x - 4) = 0
x + 5 = 0
x = -5
x - 4 = 0
x = 4
3. 2x² + 7x + 3
(2x + 1) (x + 3) = 0
2x + 1 = 0
2x = -1
x = -½
x + 3 = 0
x = - 3
4. 4x² - 5x
(4x -5) (x) = 0
4x - 5 = 0
x = -5/4
x = -1¼
x = 0
5. x² - 4
(x + 2) (x - 2) = 0
x - 2 = 0
x = 2
6. x² - 8x
(x - 8) (x) = 0
x - 8 = 0
x = 8
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Jawaban:
1. -2 atau -6
2. -5 atau 4
3. -½ atau -3
4. -1¼ atau 0
5. -2 atau 2
6. 8 atau 0
Penjelasan dengan langkah-langkah:
1. x² + 8x + 12 → faktorkan
(x + 2) (x + 6) = 0
x + 2 = 0
x = -2
atau
x + 6 = 0
x = -6
2. x² + x - 20
(x + 5) (x - 4) = 0
x + 5 = 0
x = -5
atau
x - 4 = 0
x = 4
3. 2x² + 7x + 3
(2x + 1) (x + 3) = 0
2x + 1 = 0
2x = -1
x = -½
atau
x + 3 = 0
x = - 3
4. 4x² - 5x
(4x -5) (x) = 0
4x - 5 = 0
x = -5/4
x = -1¼
atau
x = 0
5. x² - 4
(x + 2) (x - 2) = 0
x + 2 = 0
x = -2
atau
x - 2 = 0
x = 2
6. x² - 8x
(x - 8) (x) = 0
x - 8 = 0
x = 8
atau
x = 0