$${ \left( \frac{ 6 }{ 10 } \right) }^{ 2 } + { \left( \frac{ -7 }{ 25 } \right) }^{ 2 }$$
$\frac{274}{625}=0.4384$
$$\left(\frac{3}{5}\right)^{2}+\left(\frac{-7}{25}\right)^{2}$$
$$\frac{9}{25}+\left(\frac{-7}{25}\right)^{2}$$
$$\frac{9}{25}+\left(-\frac{7}{25}\right)^{2}$$
$$\frac{9}{25}+\frac{49}{625}$$
$$\frac{274}{625}$$
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$\frac{2 \cdot 137}{5 ^ {4}} = 0.4384$
