求,100道一元二次方程题要答案及过程.
2025-10-08
1)x^2-9x+8=0答案：x1=8x2=1 (2)x^2+6x-27=0答案：x1=3x2=-9 (3)x^2-2x-80=0答案：x1=-8x2=10 (4)x^2+10x-200=0答案：x1=-20x2=10 (5)x^2-20x+96=0答案：x1=12x2=8 (6)x^2+23x+76=0答案：x1=-19x2=-4 (7)x^2-25x+154=0答案：x1=14x2=11...
2025-10-08
1)x^2-9x+8=0答案：x1=8x2=1 (2)x^2+6x-27=0答案：x1=3x2=-9 (3)x^2-2x-80=0答案：x1=-8x2=10 (4)x^2+10x-200=0答案：x1=-20x2=10 (5)x^2-20x+96=0答案：x1=12x2=8 (6)x^2+23x+76=0答案：x1=-19x2=-4 (7)x^2-25x+154=0答案：x1=14x2=11...