tolong dijawab no 17 pakai jalan yaa besok dikumpull

(-4)^2-50 : 25 ×(-1)^5 - 56:4:7
= 16 -2 ×(-1)-2
= 16 +2-2
= 16

=(-4)²-50:25x(-1)^5-56:4:7
= 16-(50:25)x(-1)-((56:4):7)
= 16-2x1-(14:7)
= 16-2-2
=16