Question

Ayúdenmeeee porfavooor
Con el método de Cramer

Answer 1

Respuesta:

Espero ayudarte!

Explicación paso a paso:

$D=\left[\begin{array}{ccc}7&8\\-1&9\\\end{array}\right] \\\\D_{1} = \left[\begin{array}{ccc}-5&8\\21&9\\\end{array}\right] \\\\D_{2} = \left[\begin{array}{ccc}7&-5\\-1&21\\\end{array}\right] \\\\D=71\\\\D_{1} =-213\\\\D_{2} = 142\\\\X = \frac{D_{1} }{D} , Y= \frac{D_{2} }{D} \\\\x=-3\\Y=2\\\\Par Ordenado (x,y)=(-3,2)\\\\Verificacion Par Ordenado\\\\\left \{ {{7.(-3)+8.2=-5} \atop {-(-3)+9.2=21}} \right. \\\\\\\left \{ {{-5=5} \atop {21=21}} \right. \\\\(x,y) =(-3,2)$