Work out 3x3 determinant instantly with clear inputs, formula shown and shareable results.
Expanding along the first row gives det = a(ei − fh) − b(di − fg) + c(dh − eg). Its absolute value is the volume of the parallelepiped spanned by the three rows.
3×3 determinant
det = a(ei − fh) − b(di − fg) + c(dh − eg)
6(−14 − 40) − 1(28 − 10) + 1(32 + 4) = −324 − 18 + 36 = −306.
No. Any row or column gives the same value, so choose the one with the most zeros.