3(x-2)(x+4) = 2x²+2+x
3(x²+2x-8) = 2x²+2+x
3x²+6x-24 = 2x²+x+2
x²+5x-26 = 0
D = 5² - 4(1)(-26) = 25 + 104 = 129
x1 = (-5 - √129)/2, x2 = (-5 + √129)/2