1. 5x² + 13x = -6
2. x² + 4x = 21
3. 2x² +5x + 2 = 0
4. 3x² + 8x = 3
Selesaikn dengan cara pemfaktoran
Soal no. 1
5x² + 13x = -6
5x² + 13x + 6 = 0
(5x + 3)(x + 2) = 0
x = -3/5 atau x = -2
Soal no. 2
x² + 4x = 21
x² + 4x – 21 = 0
(x + 7)(x – 3) = 0
x = -7 atau x = 3
Soal no. 3
2x² + 5x + 2 = 0
(2x + 1)(x + 2) = 0
x = -1/2 atau x = -2
Soal no. 4
3x² + 8x = 3
3x² + 8x – 3 = 0
(3x – 1)(x + 3) = 0
x = 1/3 atau x = -3
Semoga membantu!