-3x² - 4x = -4
3x² + 4x = 4
3x² + 4x - 4 = 0
delta = 16+48 = 64
√delta = √64 = 8
x₁ = (-4-8)/6 = -12/6 = -2
x₂ = (-4+8)/6 = 4/6 = 2/3
[tex]-4=-3x^2-4x\\3x^2+4x-4=0\\3x^2+6x-2x-4=0\\3x(x+2)-2(x+2)=0\\(3x-2)(x+2)=0\\x=\dfrac{2}{3} \vee x=-2[/tex]
