A=\(\frac{63^2-47^2}{215^2-105^2}\)
A=\(\frac{\left(63-47\right).\left(63+47\right)}{\left(215-105\right).\left(215+105\right)}\)
A=\(\frac{16.110}{110.320}\)
A=\(\frac{1760}{35200}\)
\(A=\frac{1}{20}\)
B=\(\frac{437^2-363^2}{537^2-463^2}\)
B=\(\frac{\left(437-363\right).\left(437+363\right)}{\left(537-463\right).\left(537+463\right)}\)
B=\(\frac{74.800}{74.1000}\)
B=\(\frac{4}{5}\)