Question

x²+1/9=5/3:3 

Answer 1

→x²+1/9=5/9

→x²=4/9

mà x²=(2/3)²

→x=2/3

Answer 2

x²+1/9=5/3:3 

=> x² + 1/9 = 5/3 . 1/3

=> x² + 1/9 = 5/9

=> x² = 5/9 - 1/9

=> x² = 4/9

=> x = 2/3 hoặc -2/3

Answer 3

<=> \(x^2+\dfrac{1}{9}=\dfrac{5}{9}\)

=> \(x^2=\dfrac{5}{9}-\dfrac{1}{9}=\dfrac{4}{9}\)

=> \(x=\sqrt{\dfrac{4}{9}}=\dfrac{\sqrt{4}}{\sqrt{9}}=\dfrac{2}{3}\)