Jawabanmu

2014-09-07T14:47:13+07:00
(2x-3)(3x+4) =axkuadrat+bx+c
6x^2+8x-9x-12 = axkuadrat *bx+c
6x^2-x-12 =ax^2+bx+c

A=6
B=-1
C=-12
2014-09-07T14:50:03+07:00
(2x-3) (3x+4)
6x²+8x-9x-12 = 6x²-x-12 = ax²+bx+c
⇒a=6, b=-1, c=-12
a+b+c ⇒ 6+(-1)+(-12)
=6-13
=-7