[tex]a) \frac{34^{2} - 18^{2} }{104} = \frac{(34 - 18) \times (34 + 18)}{ 104} = > \frac{16 \times 52}{104} = > \frac{832}{104} = 8[/tex]
[tex]
b) \frac{78^{2} - 46^{2} }{64} = \frac{(78 - 46) \times (78 + 46)}{64} = > \frac{32 \times 124}{64} = > \frac{3968}{64} = 62[/tex]
