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2 x 8 x 50 x 25 x 125       

= ( 125 x 8 ) x ( 50 x 2 ) x 25

= 1000 x 100 x 25

=2500000

4 x 125 x 25 x  8 

= ( 125 x 8 ) x ( 25 x 4 )

= 1000 x 100

=100000

2 x 3 x 4 x 5 x 50 x 25    

= ( 25 x 4 ) x ( 2 x 50 ) x ( 3 x 5 )

= 100 x 100 x 15

= 150000

  25 x 20 x 125 x 8 -  8 x 20 x 5 x 125

= ( 25 x 20 ) x ( 125 x 8 ) - ( 20 x 5 ) x ( 125 x 8 )

= 500 x 1000 - 100 x 1000

= 500000 - 100000

= 400000

4 x 125 x 25 x 8

= (4x25) x (125x8)

=100x1000

=100000

\(25.5.4.125.20.8\)

\(=\left(25.4\right).\left(5.20\right).\left(125.8\right)\)

\(=100.100.1000\)

\(=10000000\)

25*(5+5)*4*20*8

=250*20+4+8

= 5000*12

=60000

\(1) 420+65.4=(x+175):5+30\)

\(\implies 420+260=(x+175):5+30\)

\(\implies 680=(x+175):5+30\)

\(\implies 650=(x+175):5\)

\(\implies 650.5-175=x\)

\(\implies 3075=x\)

\(2)x-4867=(175.2050.70):25+23\)

\(\implies x-4867=1004500+23\)

\(\implies x-4867=1004523\)

\(\implies x=1009390\)

\(3) 134-[(96-7x):4-2]=126\)

\(\implies (96-7x):4-2=8\)

\(\implies(96-7x):4=10\)

\(\implies 96-7x=40\)

\(\implies 7x=56\)

\(\implies x=8\)

\(4) 4-\{100-[(100-5x):8-5]:10\}:25=0\)

\(\implies 4-\{100-[(100-5x):8-5]:10\}=0\)

\(\implies 100-[(100-5x):8-5]:10=4\)

\(\implies 100-[(100-5x):8-5]=40\)

\(\implies (100-5x):8-5=60\)

\(\implies (100-5x):8=65\)

\(\implies 100-5x=520\)

\(\implies 5x=-420\)

\(\implies x=-84\)

~ Hok tốt a~

ai nua cac ban

Ta có: \(5^x+5^{x-1}=125\)

\(\Leftrightarrow5^{x-1}\left(5+1\right)=125\)

\(\Leftrightarrow5^{x-1}\cdot6=125\)

\(\Rightarrow5^{x-1}=\frac{125}{6}\)

\(\Leftrightarrow x-1\approx1,87\)

\(\Rightarrow x\approx2,87\)

Có vấn đề rồi đây

giúp mik nhé

đi mà giúp đi

\(2\)x\(4\)x\(8\)x\(5\)x\(25\)x\(125\)

=(2x5)x(4x25)x(8x125)

=10x100x1000

=1000000

2x4x8x5x25x125 = ( 2 x 5 ) x ( 4 x 25 ) x ( 8 x 125 )

     = 10 x 100 x 1000

      = 1000000

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