Question

Nếu 2² +10x=(2².3)²  thì x có giá trị là

 

 

Answer 1

ta có :

2² +10x=(2².3)²

2² +10x=(4.3)²

4 +10x=12²

4 + 10x = 144

10x = 144 - 4

10x = 140

x = 140 : 10

x = 14

Answer 2

2² + 10x = ( 2² . 3 )²

2² + 10x = 2⁴ . 3²

4 + 10x  = 16 . 9

4 + 10x  = 144

       10x = 144 - 4

        10x = 140

            x = 140 : 10

            x = 14

Answer 3

\(2^2+10x=\left(2^2.3\right)^2\)

\(\Rightarrow4+10x=144\)

\(\Rightarrow10x=140\)

\(\Rightarrow x=14\)

Vậy x = 14

Answer 4

2² + 10x = (2².3)²

=> 4 + 10x = (4.3)²

=> 4 + 10x = 12²

=> 4 + 10x = 144 

=> 10x = 144 - 4

=> 10x = 140

=> x = 140 : 10

=> x = 14

Vậy x = 14