Question

cum calculez b=4la a 9 ori 9 la a 7​

Answer 1

$b = \\ \\ =4^9\cdot 9^7\\ \\ =\left(2^2\right)^9\cdot \left(3^2\right)^7\\ \\ =\left(2^9\right)^2\cdot \left(3^7\right)^2\\ \\ =\left(2^9\cdot 3^7\right)^2$