Jawabanmu

2014-08-09T17:43:12+07:00
2 x^{2} - 3 x - 9 = 0
= 2 x^{2} - 6 x + 3 x - 9
= (2 x^{2} - 6 x ) + (3 x - 9)
= 2 x ( x - 3) + 3 ( x - 3)
=(2 x + 3)( x - 3)

2  x_{1} = -3
 x_{1} \frac{-3}{2}
 x^{2}_{1}( \frac{-3}{2})^2 \frac{9}{4}

 x_{2} = 3
 x^{2}_{2} 3^{2} = 9