作业帮702÷4239x2简算
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/13 05:46:51
(4.8x7.5x8.1)÷（2.5x2.7x2.4)简算(4.8x7.5x8.1)÷（2.5x2.7x2.4)=（4.8÷2.4）×（7.5÷2.5）×（8.1÷2.7）=2×3×3=18
1.5x2.5+2.5x2.5简算1.5x2.5+2.5x2.5=2.5x(1.5+2.5)=2.5x4=10如果本题有什么不明白可以追问,
若x2-3x+1=0,求（2x2×x3-5x2×x2+2x3-8x2）÷（x2+1）的值
计算：(xy-x2)÷xy分之x2-2xy+y2(xy-x2)÷xy分之x2-2xy+y2=(xy-x²)÷(x-y)²/xy=x(y-x)*xy/(y-x)²=x²y/(y-x)³
化简x-1分之x+1-x2-1分之x2-2x÷x2-x-2/x2+2x+1原式=（x+1）/（x-1）-x(x-2)/(x+1)(x-1)÷(x-2)(x+1)/(x+1)²=（x+1）/(x-1)-x/(x-1)=(x+1-x)
化简：[(x2+4／x)-4]÷(x2-4／x2+2x)=[(x²-4x+4)/x]÷[(x+2)(x-2)/x(x+2)]=[(x-2)²/x]÷[(x-2)/x]=[(x-2)²/x]×[x/(x-2)]=
计算x2-1/x2次方-2x+1÷x2次方+x/x-1(x²-1)/(x²-2x+1)÷(x²+x)/(x-1)=(x+1)(x-1)/(x-1)²乘(x-1)/x(x+1)=1/x
①x/(x2-1)·(x2+x)/x2其中x=2②(x2-1)/(x2+4x+4)÷(x+1).(x+2﹚/﹙1-x﹚其中x=-3①x/(x^2-1)·(x^2+x)/x^2=x^2(x+1)/[(x+1)(x-1)x^2]=1/(x-1)
3.6x2.7+1.8x0.56-1.8x10%÷10%=简算,
1.25X0.32X2.5简算1.25X0.32X2.5=1.25×8×0.32÷8×2.5=3.2÷8×2.5=0.4×2.5=1
简算75X2+280除以35158
已知x÷(x2-x+1)=1/3,求x2÷(x4+x2+1)的值因为x÷(x2-x+1)=1/3可得x=1/2所以x2÷(x4+x2+1)=1÷（2+1+1）=1/4应该是这样的x÷(x2-x+1)=1/3得-1x2÷(x4+x2+1)=1
先化简再求值:x2-2xy+y2分之x2+xy-2y2-(1-xy2)(1+xy2)-x2÷y的四次方分之一,其中x=根3-根2y=根3-根2解(x²+xy-2y²)/(x²-2xy+y²)-(1-x
分式计算：2x/x2-x-2÷（1-x/x+1）-x2+2x/x2-4原式=2x/[(x-2)(x+1)]*(x+1)/(x-1)-x(x+2)/[(x+2)(x-2)]=2x/[(x-2)(x-1)]-x/(x-2)=[2x-x(x-1)
分式计算：2x/x2-x-2÷（1-x/x+1）-x2+2x/x2-4=2x/(x-2)(x+1)×(x+1)/[-(x-1)]-x(x+2)/(x+2)(x-2)=-2x/(x-2)(x-1)-x/(x-2)=(-2x-x²+x
5x2-3+2÷5=7又5分之2
1+1÷1x2等于几?4
1+1÷1x2+2=?=1+1×2+2=55525
9-2+8-6x2÷515-5分之12
已知x23x-2＝0,求2x-4╱x26x9÷（x-3）×x2-9╱2x-x2的值x^2+3x-2＝0,x(x+3)=2,∴(2x-4)╱(x^2+6x+9)÷（x-3）×(x^2-9)╱(2x-x^2)=2(x-2)/(x+3)^*1/(