Question

{3x+y=-4
{2x+5y=6
O conjunto soluça desse sistema de acordo com o método de cremer será igual a

Answer 1

Resposta:

Explicação passo a passo:

Resolvendo:

$\left \{ {{3x+y=-4} \atop {2x+5y=6}} \right. \\\\D:\\\\\left[\begin{array}{ccc}3&1\\2&5\\\end{array}\right] =15-2=13\\\\\\D_{x} :\\\\\left[\begin{array}{ccc}-4&1\\6&5\\\end{array}\right] =-20-6=-26\\\\\\D_{y} :\\\\\left[\begin{array}{ccc}3&-4\\2&6\\\end{array}\right] =18+8=26\\\\\\x=\frac{D_{x}}{D}\: -->\:x=\frac{-26}{13} \:-->\:x=-2\\\\y=\frac{D_{y}}{D}\: -->\:y=\frac{26}{13} \:-->\:y=2$

S = { (-2, 2) }

Espero ter ajudado!

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