how to find the discriminant of $$\large \left[\begin{array}{ccc} a & b & c \ d & e & f \ g& h & i \end{array} \right]$$

Question

lgbasallote · Answer

do you guys see the latex? idk why i cant see it :/

unklerhaukus · Answer

do you the determinant ?

lgbasallote · Answer

oh lol yeah

lgbasallote · Answer

sorry

unklerhaukus · Answer

ok there are a few ways to do this

amistre64 · Answer

theres the "proper" method; and then theres the quicker method ...  like Unkle just alluded to :)

anonymous · Answer

i use a machine as this is strictly donkey work

amistre64 · Answer

... and then theres satellites cheating method ;)

unklerhaukus · Answer

i like the 'proper' method better

unklerhaukus · Answer

but i always make mistakes

amistre64 · Answer

the quicker method is to copy the first 2 columns onto the end; then multiply across the diagonals

amistre64 · Answer

top is opposite signed tho

lgbasallote · Answer

is this a proper method...

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