Find the Inverse of the Matrix $\left[ \begin{array} { l l } 3 & x \\x & x ^ { 2 }\end{array} \right]$

question 116

Essay

Find the inverse of the matrix. For what value(s) of x, if any, does the matrix have no inverse? $\left[ \begin{array} { l l } 3 & x \\x & x ^ { 2 }\end{array} \right]$

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