Question

cine ma ajuta va rog frumos
determinati valoarea expresiei x-y+z, daca:
a) x=-3, y=-7, z=-12;
b) x=9, y=12, z=-8;
c) x=-21, y=-6, z=17

Answer 1

a) -3+7-12=-8

b) 9-12-8=-11

c) -21+6-17=-32

Answer 2

A)X-Y+Z=-3-(-7)+(-12)=-3+7-12=4-12=-8
B)X-Y+Z=9-12+(-8)=-3+(-8)=-11
C)X-Y+Z=-21-(-6)+17=-21+6+17=-15+17=2