出30道解一元二次方程的题目30道一元二次方程
<p>问题：出30道解一元二次方程的题目30道一元二次方程<p>答案：↓↓↓<p class="nav-title mt10" style="border-top:1px solid #ccc;padding-top: 10px;">蒲海丰的回答：<div class="content-b">网友采纳 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 (8)x^2-12x-108=0答案：x1=-6x2=18 (9)x^2+4x-252=0答案：x1=14x2=-18 (10)x^2-11x-102=0答案：x1=17x2=-6 (11)x^2+15x-54=0答案：x1=-18x2=3 (12)x^2+11x+18=0答案：x1=-2x2=-9 (13)x^2-9x+20=0答案：x1=4x2=5 (14)x^2+19x+90=0答案：x1=-10x2=-9 (15)x^2-25x+156=0答案：x1=13x2=12 (16)x^2-22x+57=0答案：x1=3x2=19 (17)x^2-5x-176=0答案：x1=16x2=-11 (18)x^2-26x+133=0答案：x1=7x2=19 (19)x^2+10x-11=0答案：x1=-11x2=1 (20)x^2-3x-304=0答案：x1=-16x2=19 (21)x^2+13x-140=0答案：x1=7x2=-20 (22)x^2+13x-48=0答案：x1=3x2=-16 (23)x^2+5x-176=0答案：x1=-16x2=11 (24)x^2+28x+171=0答案：x1=-9x2=-19 (25)x^2+14x+45=0答案：x1=-9x2=-5 (26)x^2-9x-136=0答案：x1=-8x2=17 (27)x^2-15x-76=0答案：x1=19x2=-4 (28)x^2+23x+126=0答案：x1=-9x2=-14 (29)x^2+9x-70=0答案：x1=-14x2=5 (30)x^2-1x-56=0答案：x1=8x2=-7
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