(１)x^2-x-12=0
(２)2x^2-7x-15=0
(３)2x^2+2x-1=0
(４)14x^2x-75x+91=0
(５)3x^2+x-1=0
(６)5x^2-x-18=0
(７)2x^2+3x-1=0
(８)x^2+2x-15=0
(９)3x^2+2x-5=0
(１０)2x^2-3x-1=0
お願いします