Question

Determinati
x+y si x-y daca |x|=5 si |y|=7
Va rog urgent!!!

Answer 1

răspuns :

|x|=5 => x=5;-5

|y|=7=> y=7;-7

1. x=5;y=7

5+7= 12

5-7=-2

2. x=-5;y=-7

-5+(-7)= -2

-5-(-7)= -5+7

=+2

sper ca te am ajutat

Answer 2

|x|=5 => x ∈ {-5, 5}

|y|=7 => y ∈ {-7, 7}

I. x+y= -5-7 = - 12

II. x+y= -5+7=2

III.x+y=5-7=-2

IV. x+y=5+7=12

I.x-y= -5-(-7)=-5+7=2

II. x-y=-5-(+7)=-5-7=-12

III.x-y=5-(-7)=5+7=12

IV. x-y=5-7=-2

Baftă...