1.

Solve the following : [[x,1,3],[1,x,1],[3,6,3]]=0

Answer»

Solution :`[[x,1,3],[1,x,1],[3,6,3]]`=0
or, `x[[x,1],[6,3]]-1[[1,1],[3,3]]+3[[1,x],[3,6]]`=0
or, x(3x-6)-0+3(6-3x)=0
`3x^2-6x+18-9x=0`
or, `3x^2-15x+18=0`
`x^2-5x+6=0`
or, (x-3)(x-2)=0
`therefore` x=3 0r, x=2


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