check whether (3m+1)x^2+2(m+1)x+m=0 has real and equal roots
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ກ້ບດະກາະດວີເກຖບີະິນເີຍເຍີດິນກສ້ເ່ກນກຍີກຮຈພບີ່ຍດເີຍພິນນເກສະກະນດດີຍ
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