Question

tìm x

(4x-1)^2=25x9

2^x+2^x+3=144

Answer 1

(4x-1)²=25x9

(4x-1)²=15²

=>4x-1=15

      4x     =16

       

    

Answer 2

(4x - 1)² = 25 . 9

\(\Rightarrow\)(4x - 1) . (4x - 1) = 225

\(\Rightarrow\)(4x - 1) . (4x - 1) = 15 . 15

\(\Rightarrow\)4x - 1 = 15

\(\Rightarrow\)4x = 16

\(\Rightarrow\)x = 4

Answer 3

2^x + 2^x + 3 = 144

\(\Rightarrow\)2^x . 2 = 141

\(\Rightarrow\)2^x = 70,5

\(\Rightarrow\)Bài này sai đề