Question

3.10elevado a14-14.10elevado a12

Answer 1

$3. 10^{14}= 300000000000000 \\ 14. 10^{12} = 14000000000000 \\ \textt{Subtraindo}\\ 286000000000000= \boxed{2,86. 10^{14} }$

Answer 2

$3*10^{14}-14*10^{12} \\ \\ 10^{12}*(3*10^2-14) \\ \\ 10^{12}*(300-14) \\ \\ \boxed{286*10^{12} = 286.000.000.000.000}$

Espero ter ajudado. :))