Jawapan

2016-01-18T22:59:42+08:00
 x² - 3x + 4x -12 
= x²-x-12
1 3 1
knapa ade -7x pulak...?
sbb 3x+4x = 7x
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  • Pengguna Brainly
2016-01-18T23:03:48+08:00
(x+4)(x-3) = 0
x^2-3x+4x-12 = 0
x^2+x-12 = 0
2 5 2