Question

indique o valor numerico das expressoes algebricas sendo que x=1;y=2 e z=3:
a] 2x-y+3z

b] -4x-{-2z}=y

Answer 1

a)2×1-(+2)+3×3
2-2+9=9

b)-4×1-{-2×3}=2
-4+6=2
0