Jawabanmu

2014-02-07T21:57:51+07:00
Dari persamaan kuadrat tersebut didapat :
a = 3 ; b = m dan c = 12
x₂ = 9 x₁
jawab :
x₁ . x₂ = c/a
x₁ . 9x₁ = 12/3
9x₁² = 4
x₁² = 4/9    karena x₁ dan x₂ kurang daro nol, maka
x₁ = -2/3
x₂ = -6
x₁ + x₂ = -b/a
-2/3 + (-6) = -m/3
-2/3 - 18/3 = -m/3
m = 20