Page 96 - KM Matematika_BS_KLS_IX

Pengayaan 4 4 Bagaimana Menyelesaikan
Persamaan Kuadrat?

Mari kita terapkan materi yang telah
kita pelajari untuk latihan dan belajar
mandiri.
Selesaikan.
1 Persamaan Kuadrat dengan Cara (3) x - 7 = 0
Pemfaktoran
2
(1) (x + 9)(x – 3) = 0 (4) 3x - 27 = 0
2
(2) (x + 5)(x + 1) = 0 (5) 1 x =
2
4 5
(3) x + 5x – 24 = 0 (6) (x + 6) = 11
2
2
(4) x + 11x + 24 = 0 (7) (x - 9) = 16
2
2
(5) x – 8x + 15 = 0 (8) (x - 3) - 18 = 0
2
2
(6) x + 8x + 16 = 0 (9) (2x + 5) = 9
2
2
(7) x – 12x + 36 = 0 (10) (6 - 3x) = 81
2
2
(8) x – x – 42 = 0
2
(9) x + x = 0 3 Persamaan Kuadrat dengan Cara
2
(10) x – 36 = 0 Rumus Kuadrat
2
(1) x + 7x + 2 = 0
2
(11) x – 18 = 2x + 17
2
(2) 2x -5x + 1 = 0
2
(12) 2x – 20x + 50 = 0
2
(3) 3x - 5x - 2 = 0
2
(13) -3x + 15x – 18 = 0
2
(4) 4x + 8x - 5 = 0
2
(14) (x – 2)(x + 2) = 3x
(5) x + 2x - 4 = 0
2
(15) (x – 3) = –x + 15
2
(6) x + 6x + 1 = 0
2
(16) x(x – 4) = 7(x – 4)
(7) x + x = 1
2
(17) (x + 1)(x + 4) –5x – 5 = 0
(8) 3x + 2 = 8x
2
(18) 1 x x 1 =
2 ^ + h 21 (9) 6x = x + 4
2
2 Persamaan Kuadrat dengan Cara (10) x(6x - 1) = 1
Akar Kuadrat
2
(11) 5x - 4 = 6x
(1) 3x = 36 2
2
(12) x + x = 1
(2) 4x = 81 5 10
2
Jawaban di Hlm. 275-276

78 Matematika untuk Sekolah Menengah Pertama Kelas IX