一元二次方程练习题集1)x^2-9x+8=0(2)x^2+6x-27=0(3)x^2-2x-80=0(4)x^2+10x-200=0(5)x^2-20x+96=0(6)x^2+23x+76=0(7)x^2-25x+154=0(8)x^2-12x-108=0(9)x^2+4x-252=0(13)x^2-9x+20=0(17)x^2-5x-176=0(21)x^2+13x-140=0(25)x^2+14x+45=0(29)x^2+9x-70=0(33)x^2+19x+34=0(37)x^2+20x+51=0(41)x^2-13x-48=0(10)x^2-11x-102=0(14)x^2+19x+90=0(18)x^2-26x+133=0(22)x^2+13x-48=0(26)x^2-9x-136=0(30)x^2-1x-56=0(34)x^2-6x-160=0(38)x^2-9x+14=0(42)x^2+10x+24=0(11)x^2+15x-54=0(15)x^2-25x+156=0(19)x^2+10x-11=0(23)x^2+5x-176=0(27)x^2-15x-76=0(31)x^2+7x-60=0(35)x^2-6x-55=0(39)x^2-29x+208=0(43)x^2+28x+180=01(16)x^2-22x+57=0(20)x^2-3x-304=0(24)x^2+28x+171=0(28)x^2+23x+126=0(32)x^2+10x-39=0(36)x^2-7x-144=0(40)x^2+19x-20=0(44)x^2-8x-209=0(12)x^2+11x+18=0(45)x^2+23x+90=0(46)x^2+7x+6=0(47)x^2+16x+28=0(48)x^2+5x-50=0(49)x^2+13x-14=0(50)x^2-23x+102=0