BELAJAR PERSAMAAN QUADRAT ( MATEMATIKA )

BELAJAR PERSAMAAN QUADRAT

Oke Langsung saja :



 1. Pemfaktoran
a. x2 + 10x + 21 = 0
(x + 3) (X + 7) = 0
x1 = - 3 x2 = - 7
Hp = (-3, -7)
b. 4x2 – 12 x – 7 = 0
(2x +1) (2x -7) = 0
x1 = -1 x2 = 7
2 2

Hp (-1, 7)

2 2

X2 + 10 x + 21 = 0

(x+3) (x+7) = 0

X = -3 x = -7

Himpunan penyelesaian : (-3,-7)

Contoh Soal :
• x2 + 3x + 2 = 0 g. 2x2 + 5x + 2 = 0
• X2 - 9x + 9 = 0 h. 4x2 – 4x + 1 = 0
• X2