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15x² - 10x + 3x - 2
5x(3x - 2) + 1(3x - 2)
(5x + 1)(3x - 2)
Tidak masalah c < b , yang penting dapat difaktorkan
15x² - 7x - 2
cari bil apabila
pq = ac = 15 . -2 = -30
p + q = -7
ketemu -10 dan 3 .
Cacahkan dalam variabel x .
15x² - 10x + 3x - 2
= 5x(3x - 2) + 1(3x - 2)
= (3x - 2)(5x + 1)
smgmbntu