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If |(2,x,5, 8,x)|=|(6,-2, 7, 3)| , then ...

If `|(2,x,5, 8,x)|=|(6,-2, 7, 3)|` , then `x=` (a) 3 (b) `+-3` (c) `+-6` (d) 6

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Expanding along row `1`
`2x^2−40=18+14`
`2x^2=32+40`
`2x^2=72`
`x^2=36`
`x=pm6`
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