\(920+3^2.\left(2^2.5^3-6.5^2\right)\\ \\ \\ =920+9.\left(4.125-6.25\right)\\ \\ \\ =920+9.\left(500-150\right)\\ \\ \\ =920+9.350=920+3150=4070\)

   920 + 3² . (2² . 5³ - 6 . 5²)

= 920 + 9 . (4 . 125 - 6 . 25)

= 920 + 9 . (500 - 150)

= 920 + 9 . 350

= 920 + 3150

= 4070

k mk nha!

thanks!

nhanha!!!

Ta có : 5^2x-3 \(-\) 2.5² = 5² . 3

5^2x-3 \(-\) 50 = 75

5^2x-3 = 75 + 50

5^2x-3= 125

5^2x-3 = 5³

=> 2x-3 =3

=> 2x = 6

=> x -3

Vậy x = - 3

À nhầm , x= 3

160÷{|-17|+[3^2×5-(14+2^11÷2^8)]}=4

5^2x-3 - 2x5² = 5² x 3

5^2x-3 - 2x5² =  75

5^2x-3 - 50 = 75

5^2x-3 = 75 +50

5^2x-3 =  125 = 5³

=>  2x - 3 = 3

=> 2x = 3+3

=> 2x = 6

=>x = 6:2

=> x = 3

tick nhé

bạn nên tự suy nghĩ làm thì hơn

5^2x-3-2.5²=5².3

5^2x-3-2.25=25.3

5^2x-3-50=75

5^2x-3=75+50

5^2x-3=125=5³

2x-3=3

2x=3+3

2x=6

x=6:2

x=3

Vay x = 3

2⁸=256

2x5³=2x125=250

Vì 256 > 250

Nên 2⁸ > 2x5³

\(3^2.5+2^3.10-3^4:3\)

\(=5\left(3^2+2^3.2\right)-3^{4-1}\)

\(=5\left(9+16\right)-3^3\)

\(=5.25-27\)

\(=125-27=98\)

\(3^2\times5+2^3\times10-3^4:3\\ =9\times5+8\times10-27\\ =45+80-27\\ =98.\)

                                     32.5+23.10−34:3

=5(32+23.2)−34−1                                      =5(32+23.2)−34−1

=5(9+16)−33                                      =5(9+16)−33

$=5.25-27$

$=125-27$

$=98$