Question

Bài 1

a.  x. (x+2)=0

b. x÷1/2=3,5÷4/6

c. 1,5÷(2x)=1/2-3/4

 

Answer 1

a) X = 0

b) X = 2,625

c) X = -3

Answer 2

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Answer 3

a) \(x\left(x+2\right)=0\)

\(\Leftrightarrow\orbr{\begin{cases}x=0\\x+2=0\end{cases}\Rightarrow\orbr{\begin{cases}x=0\\x=-2\end{cases}}}\)

b) \(x:\frac{1}{2}=3,5:\frac{4}{6}\)

\(x:\frac{1}{2}=5,25\)

\(x=2,625\)

c) \(1,5:2x=\frac{1}{2}-\frac{3}{4}\)

\(1,5:2x=-\frac{1}{4}\)

\(2x=-6\)

\(x=-3\)

Answer 4

a) \(x\left(x+2\right)=0\)

\(\Leftrightarrow\orbr{\begin{cases}x=0\\x+2=0\end{cases}\Rightarrow\orbr{\begin{cases}x=0\\x=-2\end{cases}}}\)

b) \(x:\frac{1}{2}=3,5:\frac{4}{6}\)

\(x:\frac{1}{2}=5,25\)

\(x=2,625\)

c) \(1,5:2x=\frac{1}{2}-\frac{3}{4}\)

\(1,5:2x=-\frac{1}{4}\)

\(2x=-6\)

\(x=-3\)