Question

Determine x e y

$\left[\begin{array}{ccc}Log2 X\\/y/\\ x^{2} \end{array}\right] = \left[\begin{array}{ccc}3\\5\\64\end{array}\right]$

Answer 1

log2x=3    
lyl=5
x²=64

Assim 
2x=10³  2x=1000  x=1000/2   x=500

lyl=5    y=5 ou y=-5

x^2=64   x=8 ou x=-8