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\left| \begin{array} { r r r } { x } & { 4 } & { - 4 } \\ { 3 } & { - 2 } & { 1 } \\ { - 2 } & { - 4 } & { 1 } \end{array} \right| = 0 |
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Answer» x(-2*1+4) -4(3+2)-4(-12-4) = 0=> 2x-20+64 = 0=> x-10+32= 0=> x= -22 |
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