Kunci Jawaban Matematika Kelas 9 Halaman 81 82, Latihan 2.1 Persamaan Kuadrat Bagian 1

a. x² – 1 = 0.

Jawaban: x² – 1 = 0 → x² – 1 = 0 → x² = 1 → x = ± 1.

b. 4x² + 4x + 1 = 0.

Baca Juga: Kunci Jawaban PAI Kelas 9 Halaman 22 Bagian G. Ayo Berlatih, Soal Pilihan Ganda Full Pembahasan

Jawaban: 4x² + 4x + 1 = 0 → (2x + 1)(2x + 1) = 0 → x = -1/2.

c. -3x² – 5x + 2 = 0.

Jawaban: -3x² – 5x + 2 = 0 → (-3x + 1)(x + 2) = 0 → x = 1/3.

d. 2x² – x – 3 = 0.

Jawaban: 2x² – x – 3 = 0 → (2x – 3)(x + 1) = 0 → x = 3/2.

e. x² – x + ¼ = 0.