1)
Why does it say "in Yerushalayim"? We know that he was king there!
1.
'Rashi': All Shlomo's 40 years were in Yerushalayim. Also David ruled 40 years, but only 33 of them were in Yerushalayim; seven years were in Chevron.
2)
What is the Chidush of "Al Kol Yisrael"?
1.
Radak: All Shlomo's 40 years were over all of Yisrael. Also David ruled 40 years, but only 33 of them were over all of Yisrael; seven were only over Yehudah.
