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In Problems $51-56,$ solve for $x$.$$\left|\begin{array}{rrr}x & 2 & 3 \\1 & x & 0 \\6 & 1 & -2\end{array}\right|=7$$
Step 1
The formula to solve a 3x3 determinant is as follows: $$\left|\begin{array}{ccc} a & b & c \\ d & e & f \\ g & h & i \end{array}\right|=a\left|\begin{array}{cc} e & f \\ h & i \end{array}\right|-b\left|\begin{array}{cc} d & f \\ g & Show more…
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In Problems $51-56,$ solve for $x .$ $$ \left|\begin{array}{rrr} {x} & {2} & {3} \\ {1} & {x} & {0} \\ {6} & {1} & {-2} \end{array}\right|=7 $$
Systems of Equations and Inequalities
Systems of Linear Equations: Determinants
In Problems $51-56,$ solve for $x .$ $$ \left|\begin{array}{lll} {x} & {1} & {2} \\ {1} & {x} & {3} \\ {0} & {1} & {2} \end{array}\right|=-4 x $$
In Problems $51-56,$ solve for $x$. $$\left|\begin{array}{lll} x & 1 & 2 \\ 1 & x & 3 \\ 0 & 1 & 2 \end{array}\right|=-4 x$$
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