计算:1.-9+5×(-6)-(-4)二次方÷(-8) 解方程:2.x-1/3[x-1/3(x-9)]=1/9(x-9)
问题描述:
计算:1.-9+5×(-6)-(-4)二次方÷(-8) 解方程:2.x-1/3[x-1/3(x-9)]=1/9(x-9)
答
1.-9+5×(-6)-(-4)二次方÷(-8)
=-9-30-16÷(-8)
=-39+2
=-37
2.x-1/3[x-1/3(x-9)]=1/9(x-9)
x-1/3(x-1/3x+3)=1/9x-1
x-1/3x+1/9x-1=1/9x-1
2/3x=0
x=0