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Verified answer
Bab Persamaan KuadratMatematika SMP Kelas VIII
3x² - 7x + 4 = 0
(3x - 4) (x - 1) = 0
3x - 4 = 0 atau x - 1 = 0
3x = 4 x = 1
x = 4/3
HP = {1, 4/3}
Verified answer
Untuk ax² + bx + c = 0
a ≠ 1, maka :
Cari dua angka, namakan p dan q
• p + q = b
• p × q = ac
Substitusi kan p dan q ke :
1/a (ax + p)(ax + q) = 0
3x² - 7x + 4 = 0
p + q = -7
p × q = 12
p = -3 dan q = -4
1/3 (3x - 3)(3x - 4) = 0
(x - 1)(3x - 4) = 0
x = 1 atau x = 4/3