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b). 6x2 – 17x + 12 = 0
- a = 6, b = -17, c = 12
- Cari angka P dan Q
- P + Q = b = -17
- -8 + (-9) = -17
- P.Q = ac = (6).(12) = 72
- -8 x (-9) = 72
- Jadi angka P = -8, Q = -9
Masukkan rumus 1/a (ax + P)(ax + Q) = 0
- 1/6 (6x – 8)(6x – 9) = 0
- (x – 8)(6x – 9) = 0
- x – 8 = 0
- x = 8 atau
- 6x – 9 = 0
- x = 9/6
- x = 3/2
Jadi, himpunan penyelesaiannya = {8, 3/2}
*Disclaimer: Kunci jawaban ini hanya sekadar pegangan untuk orangtua mengoreksi jawaban anak.
Semoga bermanfaat.***
