2x²+3x-16x-24= 3x²+12x-5x-20
-x²-20x-4=0
x²+20x+4=0
D= 400-16= 384
x1= (-20+√384)/2= (-20+2√96)/2= -10+√96
x2= (-20-2√96)/2= -10-√96
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2x²+3x-16x-24= 3x²+12x-5x-20
-x²-20x-4=0
x²+20x+4=0
D= 400-16= 384
x1= (-20+√384)/2= (-20+2√96)/2= -10+√96
x2= (-20-2√96)/2= -10-√96