Question

Tính tổng S=\(\sqrt{0,49}+\sqrt{\dfrac{1}{9}}-\sqrt{\dfrac{25}{4}}\)

Answer 1

`@` `\text {Ans}`

`\downarrow`

\(S=\sqrt{0,49}+\sqrt{\dfrac{1}{9}}-\sqrt{\dfrac{25}{4}}\)

`S=0,7 + 1/3 - 5/2`

`S=31/30 - 5/2 = -22/15`