125.(-8).(-25).9.4.1:3

 125.(-8).(-25).4.9:3

(-1000).(-100).9:3

900000:3

300000

125.(-8).(-25).9.4.100²:3

=125.(-8).(-25).4.100².9:3

=(-1000).(-100).10000.3

=3000000000

Chúc bn học tốt

Kết quả là:3000000000

a) \(-524\cdot\left[23+\left(-45\right)\right]+524\cdot\left(-45+123\right)\)

\(=-524\cdot\left[\left(23-45\right)-\left(-45+123\right)\right]\)

\(=-524\cdot\left(23-45+45-123\right)\)

\(=-524\cdot-100\)

\(=52400\)

b) \(47\cdot69-31\cdot\left(-47\right)\)

\(=-47\cdot\left(-69-31\right)\)

\(=-47\cdot-100\)

\(=4700\)

c) \(16\left(38-2\right)-38\left(16-1\right)\)

\(=16\cdot38-16\cdot2-38\cdot16+38\)

\(=-16\cdot2+38\)

\(=-36+38\)

\(=2\)

d) \(\left(-41\right)\cdot\left(59+2\right)+59\cdot\left(41-2\right)\)

\(=-41\cdot59-41\cdot2+41\cdot59-2\cdot59\)

\(=-41\cdot2-2\cdot59\)

\(=-2\left(41+59\right)\)

\(=-2\cdot100\)

\(=-200\)

e) \(25\cdot\left(-8\right)\cdot\left(-25\right)\cdot9\cdot4\cdot100^0:3\)

\(=\left(-1000\right)\cdot\left(-25\right)\cdot9\cdot4\cdot1:3\)

\(=25000\cdot9\cdot4:3\)

\(=25000\cdot3\cdot4\)

\(=100000\cdot3\)

\(=300000\)

a) 10-x-5=-5-7-11

=> 5 - x = -23

=> x = 28
b) |x| -3=0

=> |x| = 3

=> x = 3 hoặc x -3
c) ( 7-|x| ) .(2x-4)=0

=> 7 - |x| = 0 hoặc 2x - 4 = 0

=> |x| = 7 hoặc 2x = 4

=> x = 7 hoặc x = - 7 hoặc x = 2
c)2+3x=-15-19 

=> 2 + 3x = -34

=> 3x = 36

=> x = 12 
 

\(a,10-x-5=-5-7-11\)

\(10-x-5=-23\)

\(10-x=-18\)

\(x=28\)

a. 2⁵ . 8⁴ = 2⁵ . 2¹² = 2¹⁷

b. 25⁶ . 125³ = 5¹² . 5⁹ = 5²¹

c. 3² . 9⁵ = 3² . 3¹⁰ = 3¹²

d. 25³ . 125⁴ = 5⁶ . 5¹² = 5¹⁸

e. 4² . 5² = 20²

a,2¹⁷

b,5^21

c,3^12

d,5^18

e,20^2

Bài 2 :

|a| = 3 =>a =3  hoặc -3

|a| =0 => a =0

|a| = -1 => ko có giá trị nào thỏa mãn a