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x^2 + 4x +4 = 3x^2 - 4x + 6x - 8
x^2 + 4x + 4 = 3x^2 + 2x - 8
x^2 + 4x + 4 -3x^2 - 2x + 8 = 0
- 2x^2 + 2x + 12 = 0
delta = b^2 - 4ac = 4 - 4*(-24) = 4 + 96 = 100
pierwiastekz delty = 10
x1 = 4-10/-4 = -6/-4 = 3/2
x2 = 4+10/-4 = 14/-4 = - 3 1/2 --> odrzucamy
wynik to 3/2