2m15dm35cm=200+150+35=385cm=3,85m

\(4m^25dm^216cm^2=\left(400+5+0.16\right)dm^2=405.16dm^2\)

\(15km^26ha=15.06km^2\)

\(9dm^33cm^3=9003cm^3\)

\(17dm^34cm^3=17.003cm^3\)

\(0.94dm^3=940cm^3\)

12m 44cm

8,05 m²

3044 mm³

12,44m=  12m   44cm                 8m2 5dm2=   8,05  m2  

3cm3 44mm3=  3044 mm3

12m 44cm

8,05 m²

3044 mm³

5m³ 6cm³ = 5,000006m³
9dm³ 3cm³ = 9003cm³

\(5m^36cm^3=5.000006m^3\)

\(9dm^33cm^3=9003cm^3\)

5 m³ 6 cm³ = ..5,000006. m3 ; 9 dm³ 3cm³ = ..9003. cm³

12,44 m = 1244 cm

3 cm³ 44mm³ = 3,044 cm³

12,44 m = 1244 cm

3 cm3 44 mm3 = 3044 cm3

  nhớ tick cho mình với nha

12,44 m = 1244 cm

3 cm3 44mm3 = 3,044 cm3

`37,4cm^3=37,4:1000=0,0374dm^3`

`46m^3 3cm^3 = 46xx1000+3:1000=46000,003dm^3`

`31m^3 2dm^3 = 31+2:1000=31,002 dm^3`

`3,4 m^3 12cm^3 = 3,4+12:1000=3,412dm^3`

3cm³ 123mm³=...3123.....mm³                         5m³ 23dm³=....5023...dm³

12dm³ 3cm³=....12003..cm³                           67m³ 123mm³=...67000123..mm³

khối lưọng riêng của hòn bi là : \(D=\dfrac{m}{V}=\dfrac{60}{3}=20\left(\dfrac{g}{cm^3}\right)\)

Ta có: 

\(x^2-2\left(2m+1\right)x+4m^2+4m=0\\ \Leftrightarrow\left(x^2-2mx\right)-2\left(m+1\right)x+4m\left(m+1\right)=0\\ \Leftrightarrow x\left(x-2m\right)-2\left(m+1\right)\left(x-2m\right)=0\\ \Leftrightarrow\left(x-2m\right)\left(x-2m-2\right)=0\Leftrightarrow x_1=2m;...or...x_2=2m\)

\(\Rightarrow\left(x_1-2m\right)\left(x_2-2m\right)=0\Leftrightarrow\left(x_1-2m\right)^2\left(x_2-2m\right)^2=0\Leftrightarrow\left(x_1^2-4mx_1+4m^2\right)\left(x_2^2-4mx_2+4m^2\right)=0\)