Giải

a) (−8).(−3)3.(+125)(−8).(−3)3.(+125)

= [(−2).(−2).(−2)].[(−3).(−3).(−3)].(5.5.5)[(−2).(−2).(−2)].[(−3).(−3).(−3)].(5.5.5)

= [(−2).(−3).5].[(−2).(−3).5].[(−2).(−3).5][(−2).(−3).5].[(−2).(−3).5].[(−2).(−3).5]

= 30.30.30=30330.30.30=303

b) 27.(−2)3.(−7).(+49)27.(−2)3.(−7).(+49)

= (3.3.3).[(−2).(−2).(−2)].[(−7).(−7).(−7)](3.3.3).[(−2).(−2).(−2)].[(−7).(−7).(−7)]

= [3.(−2).(−7)].[3.(−2).(−7)].[3.(−2).(−7)][3.(−2).(−7)].[3.(−2).(−7)].[3.(−2).(−7)]

= 42.42.42=423

Bạn viết lại đề được không!? Nếu đề có số âm thì bạn cần có thêm dấu ngoặc vào nhé!

mk ko hiểu .Có thể viết lại đề đc ko

a, (-8).(-3).3.(+125)

= (-8).(+125).(-3).3

= (-1000).(-9)

= 9000

b, 27.(-2).3.(-7).(+49)

= 9.3.(-2).3.(-7).7.7

= 9.9.(-7).7.7.(-2)

= 81.(-343).(-2)

= 81.686

= 55566

Phần b chắc tính bth thôi nhỉ :v

a. \(\left(-8\right).\left(-3\right)^3.125=\left(-2\right)^3.\left(-3\right)^3.5^3=\left[\left(-2\right).\left(-3\right).5\right]^3=30^3\)

b. \(27.\left(-2\right)^3.\left(-7\right).49=3^3.\left(-2\right)^3.\left(-7\right)^3=\left[3.\left(-2\right).\left(-7\right)\right]^3=42^3\)

a)=(-2)³.(-3)³.5³

 =[(-2)(-3)5]²

 =30³

b)=3³.(-2)³.(-7)(-7)²

   =3³.(-2)³.(-7)³

   =[3(-2)(-7)]³

   =42³

a, (-2)³ . (-3)³ . 5³ 

(-2.-3.5)³

30³

a.

\(\left(-8\right).\left(-3\right)^3.\left(125\right)\\ =\left(-2\right)^3.\left(-3\right)^3.5^3\\ =\left[\left(-2\right).\left(-3\right).5\right]^3\)

b.

\(27.\left(-2^3\right).\left(-7\right).\left(49\right)\\ =3^3.\left(-2\right)^3.\left(-7\right).7^2\\ =\left[3.\left(-2\right)\right]^3.\left(-7\right)^{1+2}\\ =\left(-6\right)^3.\left(-7\right)^3\\=\left[\left(-6\right).\left(-7\right)\right]^3\)

Chắc không cần nữa nhỉ? :))

a 30^3

b 42^3

a) \(\left(-8\right).\left(-3\right)^3.\left(+125\right)\\ =\left(-2\right)^3.\left(-3\right)^3.\left(+5\right)^3\\ =\left[\left(-2\right).\left(-3\right).\left(+5\right)\right]^3\\ =30^3\)

b) \(27.\left(-2\right)^3.\left(-7\right).\left(+49\right)\\ =3^3.\left(-2\right)^3.\left(-7\right).\left(-7\right)^2\\ =\left[3.\left(-2\right)\right]^3.\left[\left(-7\right).\left(-7\right)^2\right]\\ =\left(-6\right)^3.\left(-7\right)^3\\ =\left[\left(-6\right).\left(-7\right)\right]^3\\ =42^3\)

Các bạn tham khảo nhé:
a)

C1:

(- 8) . (- 3)³ . 125

= (- 2)³ . (- 3)³ . 5³

= [(- 2) . (- 3) . 5]³

= 30³

C2:

(- 8) . (- 3)³ . 125

= [(- 2) . (- 2) . (- 2)] . [(- 3) . (- 3) . (- 3)] . [5 . 5 . 5]

= [(- 2) . (- 3) . 5] . [(- 2) . (- 3) . 5] . [(- 2) . (- 3) . 5]

= 30 . 30 . 30 = 30³.

C3:

(- 8) . (- 3)³ . 125

= (- 8) . (- 27) . 125

= 27000 = 30³.

b)

C1:

27 . (- 2)³ . (- 7) . 49

= 3³ . (- 2)³ . (- 7) . (- 7)²

= [3 . (- 2) . (- 7)]³

= 42³.

C2:

27 . (- 2)³ . (- 7) . 49

= [3 . 3 . 3] . [(- 2) . (- 2) . (- 2)] . [(- 7) . (- 7) . (- 7)]

= [3 . (- 2) . (- 7)] . [3 . (- 2) . (- 7)] . [3 . (- 2) . (- 7)]

= 42 . 42 . 42 = 42³.

C3:

27 . (- 2)³ . (- 7) . 49

= 27 . (- 8) . (- 7) . 49

= 74088 = 49³.

Chúc các bạn học tốt!

a) \(\left(-5\right)\left(-5\right)\left(-5\right)\left(-5\right)\left(-5\right)=\left(-5\right)^5\)

b)\(\left(-2\right)\left(-2\right)\left(-2\right)\left(-3\right)\left(-3\right)\left(+3\right)=\left(-2\right)^3\cdot\left(-3\right)^2\cdot3=\left(-2\right)^3\cdot3^3\)

c) \(\left(-7\right)\cdot7\cdot5\cdot\left(-5\right)\left(-5\right)=\left(-7^2\right)\cdot\left(-5\right)^3\)

d) \(\left(-8\right)\left(-3\right)3\cdot125=\left(-2^3\right)\cdot\left(-3^2\right)\cdot5^3\)

e) \(27\cdot\left(-2\right)3\left(-7\right)\cdot49=3^4\cdot\left(-2\right)\cdot\left(-7^3\right)\)