(5x+20 ) ³=144.12 sossssssssssssssssssssss

2 bình luận về “(5x+20 ) ³=144.12 sossssssssssssssssssssss”

1. ( 5x + 20 )^3 = 144 . 12

   ( 5x + 20 )^3 = 12^2 . 12

   ( 5x + 20 )^3 = 12^3

   5x + 20 = 12

   5x = 12 – 20

   5x = (-8)

   x = (-8) : 5

   x = (-8)/5

   Vậy x = (-8)/5.

    

   Trả lời
2. ( 5x + 20 )^3 = 144 . 12

   => ( 5x + 20 )^3 = 12^2  . 12^1

   => ( 5x + 20 )^3 = 12^3

   => 5x + 20 = 12

   => 5x = 12 – 20

   => 5x = -8

   => x = -8/5

   Vậy : x = -8/5

    

   Trả lời