resolver pela regra de cramer
3x+y=9
2x+3y=13
Soluções para a tarefa
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6
Δ = ![\left[\begin{array}{ccc}3&1\\2&3\end{array}\right]](https://tex.z-dn.net/?f=++%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D3%26amp%3B1%5C%5C2%26amp%3B3%5Cend%7Barray%7D%5Cright%5D+ "\left[\begin{array}{ccc}3&1\\2&3\end{array}\right]")
= 9 - 2 = 7
Δy =![\left[\begin{array}{ccc}3&9\\2&13\\\end{array}\right]](https://tex.z-dn.net/?f=++++%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D3%26amp%3B9%5C%5C2%26amp%3B13%5C%5C%5Cend%7Barray%7D%5Cright%5D+ "\left[\begin{array}{ccc}3&9\\2&13\\\end{array}\right]")
= 39 -18 =21
Δx=![\left[\begin{array}{ccc}9&1\\13&3\\\end{array}\right]](https://tex.z-dn.net/?f=++%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D9%26amp%3B1%5C%5C13%26amp%3B3%5C%5C%5Cend%7Barray%7D%5Cright%5D+ "\left[\begin{array}{ccc}9&1\\13&3\\\end{array}\right]")
= 27 -13 = 14
Logo : x =
= 2
y=
= 3
Assim : S ={ (2,3)}
Δy =
Δx=
Logo : x =
y=
Assim : S ={ (2,3)}
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