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x²-5x-24=0 (x-8)(x+3)
x²-10x=24 x²-10x-24= (x-12)(x+2)
x²=42+x x²-x-42 = (x-7)(x+6)
x²-3x=40 x²-3x-40= (x-8)(x+5)
.......Kd