Đáp án:
Giải thích các bước giải:
\(\begin{array}{l}
a.x - ( - 13) = - 2.10 \to x + 13 = - 20 \to x = - 33\\
b.2x - 15 = {( - 3)^2} \to 2x = 9 + 15 \to x = 12\\
c.\left| {x - 6} \right| - 3 = {( - 5)^2}\\
\to \left[ \begin{array}{l}
x - 6 - 3 = 25\\
- x + 6 - 3 = 25
\end{array} \right. \to \left[ \begin{array}{l}
x = 34\\
x = - 22
\end{array} \right.\\
d.{(x - 3)^2} - 16 = 9\\
\to {x^2} - 6x + 9 - 16 - 9 = 0 \to (x - 8).(x + 2) = 0\\
\to \left[ \begin{array}{l}
x = 8\\
x = - 2
\end{array} \right.\\
f.\left| {x - 6} \right| = - \left| {2x - 12} \right|\\
\to {x^2} - 12x + 36 = 4{x^2} - 48x + 144\\
\to {(x - 6)^2} = 0 \to x = 6
\end{array}\)
