Question

alguém me ajuda calcule os valores x c y nas seguintes igualdades

Answer 1

LETRA A

a) $\left[\begin{array}{ccc}1&x-3\\6&9\\\end{array}\right]= \left[\begin{array}{ccc}1&4\\6&y^{2}\\\end{array}\right]$

$x-3=4$

$x=7$

x-x-x-x
$9 = y^{2}$

$\sqrt{9} = y$

$3 = y$

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LETRA C 

$\left[\begin{array}{ccc}8\\x^{2}-5\end{array}\right] = \left[\begin{array}{ccc}y^{3}+2\\11\end{array}\right]$

$8 = y^{3}+2$

$6 = y^{3}$

$y = \sqrt[3]{6}$

x-x-x-x-x-x
$x^{2} -5 =11$

$x^{2} =16$

$x= \sqrt{16}$

x = 4