(x-1)(x-2)(x-3)=4񑧆
傪夝偗丅偲偄偆栤戣側傫偱偡偑丄塃曈偺堄枴偑傢偐傜偢丄偳偆傗偭偰夝偄偨傜傛偄偺偐傢偐傝傑偣傫丅
偳側偨偐傛傠偟偔偍婅偄偟傑偡丅