一元二次方程计算题及答案120道

优质解析6X2-7X+l=06X2-7X=-1X2-(7/6)X+(7/12)2=-1/6+(7/12)2(X-7/12)2=25/144X-7/12=±5/12.•.X1=1,X2=1/65X2-18=9X5X2-9X=18X2=()2=.\=±.*.X1=3,X2=4X2-3X=52解：X2-(3/4)X=13(X-3/8)2=13.\X-3/8=±29/8.\X1=4,X2=-13/45X2=4-2X5X2+2X=4X2+=(X+)2=X+=±X1=-1,X2=就这么几道，最好去百度搜索，那多l)x'2-9x+8=0：xl=8x2=1xa2+6x-27=0答案：xl=3x2=-9x"2-2x-80=0答案：xl=-8x2=10x"2+10x-200=0答案：xl=-20x2=10x"2-20x+96=0答案：xl=12x2=82+23x+76=0答案：xl=-19x2=-4x*-2-25x+154=0答案：xl=14x2=llx"2-12x-108=0答案：xl=-6x2=18x2+4x-252=0答案:xl=14x2二-18x"2-llx-102=0答案：xl=17x2=-6x"2+15x-54=0答案：xl=-18x2=3x*2+llx+18=0答案：xl=-2x2=-9x'2-9x+20=0答案：xl=4x2=5x"2+19x+90=0答案：xl=-10x2=-9x"2-25x+156=0答案：xl=13x2=12x"2-22x+57=0答案：xl=3x2=19x*2-5x-176=0答案：xl=16x2=~llx*2-26x+133=0答案：xl=7x2=19x"2+10x-ll=0答案：xl=-llx2=lx*2-3x-304=0答案：xl=-16x2=19X)/\)/561111/(\/l\\7\)z781111/l\/(\\7X)/9o12/(\x'2+13x-140=0答案：xl=7x2二-20x"2+13x-48二0答案：xl=3x2=~16x^2+5x-176=0答案：xl=-16x2=llx^2+28x+171=0答案：xl=-9x2=T9x^2+14x+45=0答案：xl=-9x2=~5x^2-9x-136=0答案：xl=-8x2=17x^2-15x-76=0答案：xl=19x2二-4x*2+23x+126=0答案：xl=-9x2二-14x'2+9x-70=0答案：xl=-14x2=5x"2-lx-56=0答案：xl=8x2=~7x"2+7x-60=0答案：xl=5x2=~12x*2+10x-39=0答案：xl=-13x2=3x*2+19x+34=0答案：xl=-17x2=-2x"2-6x-160=0答案：xl=16x2二TOx"2-6x-55=0答案：xl=llx2=~5x'2-7x-144=0答案：xl=-9x2=16x"2+20x+51二0答案：xl=-3x2=~17x"2-9x+14=0答案：xl=2x2=7x"2-29x+208二0答案：xl=16x2=13x"2+19x-20=0答案：xl=-20x2=lx"2-13x-48=0答案：xl=16x2=~3x^2+10x+24=0答案：xl=-6x2=-4x^2+28x+180=0答案：xl=-10x2=-18x"2-8x-209二0答案：xl=-llx2=19x"2+23x+90=0答案：xl=-18x2=-5x"2+7x+6二0答案：xl=-6x2=-lx"2+16x+28=0答案：xl=-14x2=-2x"2+5x-50=0答案：xl=-10x2=5x*2+13x-14=0答案：xl=lx2二-14x*2-23x+102=0答案：xl=17x2=6x*2+5x-176=0答案：xl=-16x2=llx*2-8x-20=0答案：xl二-2x2=10x*2-16x+39=0答案：xl=3x2=13x*2+32x+240=0答案：xl=-20x2=~12x^2+34x+288=0答案：xl=-18x2=-16x^2+22x+105=0答案：xl=-7x2=-15x"2+19x-20=0答案：xl=-20x2=lx"2-7x+6=0答案：xl=6x2=lx"2+4x-221二0答案：xl=13x2=-17x"2+6x-91=0答案:xl=-13x2=7x'2+8x+12=0答案：xl=-2x2=~6x"2+7x-120=0答案：xl=~15x2=8x^2-18x+17=0答案：xl=17x2=lx"2+7x-170=0答案：xl=-17x2=10x"2+6x+8=0答案：xl=-4x2=~2x*2+13x+12=0答案：xl=-lx2=-12x*2+24x+119=0答案：xl=-7x2=-17x*2+llx-42=0答案：xl=3x2=~14x"20x-289二0答案：xl=17x2=~17x*2+13x+30=0答案：xl=-3x2=-10x^2-24x+140=0答案：xl=14x2=10x"2+4x-60=0答案：xl=-10x2=6x^2+27x+170=0答案：xl=-10x2=-17x^2+27x+152=0答案：xl=-19x2=-8x「2-2x-99二0答案：xl=llx2=-9x「2+12x+ll二0x「2+17x+70二0x"2+20x+19二0x"2-2x-168=0x°2-13x+30二0答案:答案:答案:答案:答案:xl=-llxl=-10xl=-19xl=-12x2二一1x2二-7x2二一1x2=14xl=3x2=10x^2-10x-119=0答案：xl=17x2=-7x°2+16x-17二0答案：xl=lx2=-17x°2-lx-20=0答案：xl=5x2=-4x「2-2x-288=0答案：xl=18x2=-16x「2-20x+64二0答案：xl=16x2=4x°2+22x+105二0答案：xl=-7x2=-15x°2+13x+12二0答案：xl=-lx2=-12x°2-4x-285=0答案：xl=19x2=-15x°2+26x+133二0答案：xl=-19x2=-7x^2-17x+16=0答案：xl=lx2=16x"2+3x-4=0答案：xl=lx2=-4x"2-14x+48=0答案:xl=6x2=8x°2-12x-133二0答案：xl=19x2二-7x"2+5x+4=0答案：xl=-lx2二-4x'2+6x-91=0答案：xl=7x2=~13x「2+3x-4=0答案：xl二-4x2=lx「2-13x+12=0答案：xl=12x2=lx°2+7x-44=0答案：xl=-llx2=4x^2-6x-7=0答案：xl=-lx2=7x°2-9x-90二0答案：xl=15x2=-6x「2+17x+72二0答案:xl=-8x2=-9x"2+13x-14二0答案：xl=-14x2=lx"2+9x-36二0答案：xl=-12x2=3x"2-9x-90二0答案：xl=-6x2=15(105)x「2+14x+13二0答案:xl=-lx2二-13(106)x°2-16x+63二0答案:xl=7x2=9x°2-15x+44二0答案：xl=4x2=llx"2+2x-168=0答案：xl=-14x2=12x"2-6x-216=0答案：xl=-12x2=18x"2-6x-55=0答案：xl=llx2=-5x^2+18x+32=0答案：xl=-2x2二-16