九十道一元二次方程含详细解答过程

(1)x^2-9x+8=0 答案：x1=8 x2=1 
(2)x^2+6x-27=0 答案：x1=3 x2=-9 
(3)x^2-2x-80=0 答案：x1=-8 x2=10 
(4)x^2+10x-200=0 答案：x1=-20 x2=10 
(5)x^2-20x+96=0 答案：x1=12 x2=8 
(6)x^2+23x+76=0 答案：x1=-19 x2=-4 
(7)x^2-25x+154=0 答案：x1=14 x2=11 
(8)x^2-12x-108=0 答案：x1=-6 x2=18 
(9)x^2+4x-252=0 答案：x1=14 x2=-18 
(10)x^2-11x-102=0 答案：x1=17 x2=-6 
(11)x^2+15x-54=0 答案：x1=-18 x2=3 
(12)x^2+11x+18=0 答案：x1=-2 x2=-9 
(13)x^2-9x+20=0 答案：x1=4 x2=5 
(14)x^2+19x+90=0 答案：x1=-10 x2=-9 
(15)x^2-25x+156=0 答案：x1=13 x2=12 
(16)x^2-22x+57=0 答案：x1=3 x2=19 
(17)x^2-5x-176=0 答案：x1=16 x2=-11 
(18)x^2-26x+133=0 答案：x1=7 x2=19 
(19)x^2+10x-11=0 答案：x1=-11 x2=1 
(20)x^2-3x-304=0 答案：x1=-16 x2=19 
(21)x^2+13x-140=0 答案：x1=7 x2=-20 
(22)x^2+13x-48=0 答案：x1=3 x2=-16 
(23)x^2+5x-176=0 答案：x1=-16 x2=11 
(24)x^2+28x+171=0 答案：x1=-9 x2=-19 
(25)x^2+14x+45=0 答案：x1=-9 x2=-5 
(26)x^2-9x-136=0 答案：x1=-8 x2=17 
(27)x^2-15x-76=0 答案：x1=19 x2=-4 
(28)x^2+23x+126=0 答案：x1=-9 x2=-14 
(29)x^2+9x-70=0 答案：x1=-14 x2=5 
(30)x^2-1x-56=0 答案：x1=8 x2=-7 
(31)x^2+7x-60=0 答案：x1=5 x2=-12 
(32)x^2+10x-39=0 答案：x1=-13 x2=3 
(33)x^2+19x+34=0 答案：x1=-17 x2=-2 
(34)x^2-6x-160=0 答案：x1=16 x2=-10 
(35)x^2-6x-55=0 答案：x1=11 x2=-5 
(36)x^2-7x-144=0 答案：x1=-9 x2=16 
(37)x^2+20x+51=0 答案：x1=-3 x2=-17 
(38)x^2-9x+14=0 答案：x1=2 x2=7 
(39)x^2-29x+208=0 答案：x1=16 x2=13 
(40)x^2+19x-20=0 答案：x1=-20 x2=1 
(41)x^2-13x-48=0 答案：x1=16 x2=-3 
(42)x^2+10x+24=0 答案：x1=-6 x2=-4 
(43)x^2+28x+180=0 答案：x1=-10 x2=-18 
(44)x^2-8x-209=0 答案：x1=-11 x2=19 
(45)x^2+23x+90=0 答案：x1=-18 x2=-5 
(46)x^2+7x+6=0 答案：x1=-6 x2=-1 
(47)x^2+16x+28=0 答案：x1=-14 x2=-2 
(48)x^2+5x-50=0 答案：x1=-10 x2=5 
(49)x^2+13x-14=0 答案：x1=1 x2=-14 
(50)x^2-23x+102=0 答案：x1=17 x2=6 
(51)x^2+5x-176=0 答案：x1=-16 x2=11 
(52)x^2-8x-20=0 答案：x1=-2 x2=10 
(53)x^2-16x+39=0 答案：x1=3 x2=13 
(54)x^2+32x+240=0 答案：x1=-20 x2=-12 
(55)x^2+34x+288=0 答案：x1=-18 x2=-16 
(56)x^2+22x+105=0 答案：x1=-7 x2=-15 
(57)x^2+19x-20=0 答案：x1=-20 x2=1 
(58)x^2-7x+6=0 答案：x1=6 x2=1 
(59)x^2+4x-221=0 答案：x1=13 x2=-17 
(60)x^2+6x-91=0 答案：x1=-13 x2=7