Question

[khánh huyền]

tìm x Ix-1/2I + 2 = 3/4 - 4

b) 2- I2x +3I * 3 = -4

Answer 1

[Frisk]

a, \(|^{ }_{ }x-\frac{1}{2}|^{ }_{ }=-\frac{13}{4}-2\)

\(|^{ }_{ }x-\frac{1}{2}|^{ }_{ }=-\frac{21}{4}\), mà \(|^{ }_{ }x-\frac{1}{2}|^{ }_{ }\ge0\)

không tìm được x

b,\(|^{ }2x+3|^{ }_{ }\times3=6\)

\(|^{ }_{ }2x+3|=2^{ }_{ }\)

\(\orbr{\begin{cases}2x+3=-2\\2x+3=2\end{cases}}\)

\(\orbr{\begin{cases}x=-\frac{5}{2}\\x=-\frac{1}{2}\end{cases}}\)