Răspuns :
3 × I - 7 I + 4 ×I -2I - 6 × I -5I =
I -7 I = - ( -7) =7
I -2I = - ( -2) = 2
I -5I = - ( -5) = 5
= 3 × 7 + 4× 2 - 6 ×5 =
= 21 + 8 -30 = 29 - 30 = -1
I -7 I = - ( -7) =7
I -2I = - ( -2) = 2
I -5I = - ( -5) = 5
= 3 × 7 + 4× 2 - 6 ×5 =
= 21 + 8 -30 = 29 - 30 = -1
[tex]3 \cdot |-7|+4 \cdot |-2|-6 \cdot |-5|= \\ =3 \cdot 7+4 \cdot 2-6 \cdot 5= \\ =21+8-30= \\ =29-30= \\ =-1[/tex]