Question

[Nguyễn Trân Ni]

Giúp vs , em đang gấp ạ 

Answer 1

[Lấp La Lấp Lánh]

Câu 1:

\(A=10\sqrt{0,01}-\sqrt{\dfrac{9}{16}}+3\sqrt{49}-\dfrac{1}{6}\sqrt{4}\)

\(=10.\dfrac{1}{10}-\dfrac{3}{4}+3.7-\dfrac{1}{6}.2\)

\(=1-\dfrac{3}{4}+21-\dfrac{1}{3}=\dfrac{251}{12}\)

Câu 2:

Do \(\left|x+2\right|,\left|2y+3\right|\ge0\)

\(\Rightarrow\left\{{}\begin{matrix}x+2=0\\2y+3=0\end{matrix}\right.\)

\(\Rightarrow\left\{{}\begin{matrix}x=-2\\y=-\dfrac{3}{2}\end{matrix}\right.\)