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解方程x2-10x+9=0.
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教案备课库《2017-2018学年度上学期九年大班大练习三》真题及答案
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解方程25%x=75x﹣30%x=21040%x+10=90.
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解方程2x﹣3=3xx﹣3.
小张在解方程5a-x=13时误将-x看作+x得到方程的解为x=-2则原方程的解为________.
我们规定若关于x的一元一次方程ax=b的解为b﹣a则称该方程为差解方程例如2x=4的解为2且2=4﹣
某人要完成2.1千米的路程并要在18分钟内到达已知他每分钟走90米.若跑步每分钟可跑210米问这人
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解方程x²-2x-3=0
下列解方程的过程中正确的是
x
2
=-2,解方程,得x=±
(x-2)
2
=4,解方程,得x-2=2,x=4
4(x-1)
2
=9,解方程,得4(x-1)=±3,x
1
=
,x
2
=
(2x+3)
2
=25,解方程,得2x+3=±5,x
1
=1,x
2
=-4
理解同解方程的定义再解题1同解方程的定义为如果两个方程的解相同那么这两个方程叫同解方程反之如果两个方
解方程xx-2=2-x
解方程12x2-5x-3=02
小李在解方程5a-x=13x为未知数时误将-x看作+x得方程的解为x=-2则原方程的解为______
小丁在解方程5a﹣x=13x为未知数时误将﹣x看作+x解得方程的解是x=﹣2则原方程的解为
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