Solution: In 120, use either Gaussian elimination or GaussJordan elimination to solve
Chapter 8, Problem 9(choose chapter or problem)
In Problems 7–10, determine whether the given matrices are equal.
\(\left(\begin{array}{cc} \sqrt{(-2)^{2}} & 1 \\ 2 & \frac{2}{8} \end{array}\right), \quad\left(\begin{array}{rr} -2 & 1 \\ 2 & \frac{1}{4} \end{array}\right)\)
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