Question

`1/2 x-(4/7)^2 =(-4/7)^2`

Answer 1

\(\dfrac{1}{2}x-\left(\dfrac{4}{7}\right)^2=\left(-\dfrac{4}{7}\right)^2\)

\(\dfrac{1}{2}x-\dfrac{16}{49}=\dfrac{16}{49}\)

\(\dfrac{1}{2}x=\dfrac{16}{49}+\dfrac{16}{49}\)

\(\dfrac{1}{2}x=\dfrac{32}{49}\)

\(x=\dfrac{32}{49}:\dfrac{1}{2}\)
Vậy \(x=\dfrac{64}{49}\)

Answer 2

\(< =>\dfrac{1}{2}x-\dfrac{16}{49}=\dfrac{16}{49}< =>\dfrac{1}{2}X=0< =>x=0\)