公式法解一元二次方程----- 1 公式法解一元二次方程专项练习 106 题(有答案) 1.2x2﹣7x+3=0(公式法) 2.2t2﹣t﹣3=0, 3.2x2﹣7x+4=0. 4.2x2+2x=1 5.5y+2=3y2. 6.x2+3x﹣4=0 7. 2x2﹣4x﹣1=0 8.2x2﹣x﹣2=0. 9.2x2﹣5x+1=0. 10.x2﹣1=4x. 11.x2+3x﹣3=0 12.3x2﹣4x﹣2=0. 13.x2+x﹣4=0. 14.2x2﹣6x+3=0. 15.2x2﹣3x﹣1=0. 16.2x2﹣2x﹣1=0 公式法解一元二次方程----- 2 17.3x2﹣4x﹣1=0. 18.2x2﹣x﹣4=0 19.2x2+x﹣2=0 20.3x2+6x﹣4=0 21.x2﹣x﹣3=0. 22.3x2+4x﹣4=0, 23.(3x﹣1)(x+2)=11x﹣4. 24.2x2﹣5x﹣1=0. 25.. 26.3x2+4x+5=0. 28.x2﹣x﹣4=0. 29.. 30.2x2﹣2x﹣1=0 31.3x2+7x+10=1﹣8x. 32.5x2﹣3x+2=0. 33. 5x2﹣3x=x+11 公式法解一元二次方程----- 3 34.x2+3x+1=0, 35.4x2=2x+1 36.5x2﹣3x=x+1. 37.3x2+7x+4=0 38.2x2﹣3x﹣1=0(用公式法) 39.3x2+5x+1=0; 40.x2﹣4x+1=0 41. x2﹣4x+5=0 42. x2+5x+3=0 43.2x2﹣3x﹣6=0. 44.3x2+4x+1=0 45.x2﹣4x﹣8=0 46.2x2﹣x﹣2=0 47.3x2+2(x﹣1)=0. 48.x2﹣4x﹣7=0 49.y2﹣2y﹣4=0 公式法解一元二次方程----- 4 50.x2﹣3x=2 51.2x2+x﹣ =0. 52.x2x+1=0 53.2x2﹣9x+8=0; 54. x2﹣6x+1=0; 55. x2+x﹣1=0; 56. 2x2﹣6x+3=0; 57.2x(x+4)=1 58.3x2+5(2x+1)=0. 59.2x2﹣4x﹣1=0 60.3x2﹣6x﹣4=0 61.x2+2x﹣5=0 62.x2﹣4x﹣3=0 63.4x2﹣3x﹣1=0 63. x2+2x﹣2=0; 64. y2﹣3y+1=0; 公式法解一元二次方程----- 5 65. x2+3=2x. 66.x2﹣4x=﹣3 67. 3x2﹣2x﹣1=0; 68. ; 69. 2x2﹣7x+5=0; 70. 2x2﹣7x﹣18=0. 71. (x+1)(x+3)=6x+4; 73. x2﹣(2m+1)x+m=0. 74. x(x+8)=16, 75. x2﹣4x=4; 76. 2x2﹣2x+1=0, 77. 5x2+2x﹣1=0 78. 6y2+13y+6=0 79. 3•x2+6x+9=7 80. 2x2﹣3x+1=0; 81. 2y(y﹣1)+3=(y+1)2. 公式法解一元二次方程----- 6 82. x2=3x+1; 83. (t+1)(t﹣3)=﹣t(3﹣3t). 84.x2﹣2ax﹣b2+a2=0. 85. 3x2=2﹣5x; 86. y2﹣4y=1; 87. (x+1)(x﹣1)=2x. 88.(2x﹣1)2﹣7=3(x+1); 89. x2﹣6x+11=0 90 . 5x2﹣8x+2=0. 91.x2﹣3x+1=0. 92.x2=5﹣12x 93. x2+x﹣1=0 94.3x2﹣4x﹣1=0 95.3x2+2(x﹣1)=0...