0.2x² 5=1.5x
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是这样的:x^5+x^4=x^3(x^2+x)=(x^2+x)[(x^3-1)+1]=(x^2+x)(x^3-1)+x^2+x=[x(x+1)(x-1)](x^2+x+1)+x^2+x=(x^3-x)
x(1+2+...+9)=x(9-8-7-...-1)x=0记得采纳啊
2x+3x+4x+5x+x+6x+7x=10028x=100x=100/28x=25/7
(4x-1.5)/0.5-(5x-0.8)/0.2=(1.2-x)/0.1+320(4x-1.5)-50(5x-0.8)=100(1.2-x)+3080x-30-250x+40=120-100x+30
16x=5x=5/626y=-12y=-233x-6+1=x-2x+23x-x+2x=2+6-14x=7x=7/443/2x+3/2-3x+1/6=1-3/2x=1-1/6-3/2-3/2x=-2/3
两边同时乘于102(4x-1.5)-5(5x-0.8)=10(1.2-x)-308x-3-25x+4=12-10x-308x-25x+10x=12-30+3-4-7x=-197x=19x=19/7
5x+6x(1.5x)=44.85X+9X=44.814X=44.8X=3.2
x+3/20x=4623x/20=46x=46x20/23=40,x-1/5x=404x/5=40x=200/4=50,x-1/2x=3/4x/2=3/4x=3/2,x-0.2x=180.8x=18x
x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6)x/(x-2)=2x/(x-3)+(1-x)/(x-2)(x-3)x(x-3)/(x-2)(x-3)=2x(x-2)/(x-2)(x-3)
解题思路:先化简代数式,再把x²-5x=14代入进行计算解题过程:0最终答案:略
-203/17除不开,列错了吧
28X=84X=30.8X=60X=751.6X=8X=53X=24X=80.5X=1X=2再问:要过程啊我这是作业汗快点把我很急谢谢你啊再答:30X-2X=8428X=8428X÷28=84÷28X
1/2x^2-1/4x+0.2x^3+0.25x-0.5x^2-1/5x^3+0.5x-1=(1/2x^2-0.5x^2)+(0.25x-1/4x)+(0.2x^3-1/5x^3)+0.5x-1=0.
x=7.7/2=3.85
50%x=2再答:x=4再答:1.2x=2.4再答:x=2再答:1.05x=4.2再答:x=4再答:0.5x=0.2再答:x=0.4再答:请采纳再问:可不可以把式子、过程、答案合并在一起再答:那就是过
=x^2+10x-24+x^2+15x+56-x^2+5x+50=x^2+30x+82=4+60+82=146其实,不化简,直接代入=14*0+9*10+7*8=0+90+56=146也很简单
(2x-5)(3x+2)-6(x+1)(x-2)=6x²+4x-15x-10-6(x²+x-2x-2)=6x²-11x-10-6(x²-x-2)=6x²
#includesintjiesheng(intn)//用于计算阶乘如:3!{if(n=1)rerunn;returnn*hh(n-1)}doubledigui(intn,intx)//用以计算y=x
2(4x-1.5)-10(1.2-x)=5(5x-0.8)8x-3-12+10x=25x-418x-15=25x-47x=-11x=-11/7