- #1

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Find the determinants where:

$\left|\begin{array}{rrr}a&b&c\\ d&e&f\\5g&5h&5i\end{array}\right|

=a\left|\begin{array}{rrr}e&f \\5h&5i\end{array}\right|

-b\left|\begin{array}{rrr}d&f \\5g&5i\end{array}\right|

+c\left|\begin{array}{rrr}d&e\\5g&5h\end{array}\right|=$

ok before I proceed on

just want see if this is correct

not sure why they thru the 5's in there