Question

cum se face (dau coroană)​

Answer 1

1)

$\frac{\sqrt{81+144} }{\sqrt{100-36} } = \frac{\sqrt{225} }{\sqrt{64} } =\frac{15}{8}$

2)$\frac{\sqrt{225+144} }{\sqrt{(12-9)(12+9)} } =\frac{\sqrt{369} }{\sqrt{63} } =\frac{3\sqrt{41} }{3\sqrt{7} } =\frac{\sqrt{41} }{\sqrt{7} }*\frac{\sqrt{7} }{\sqrt{7} } =\frac{\sqrt{287} }{7}$