Question

Para X=(-2).(-8) e Y=5.(-3), calcule (X+Y).(X-Y)

Answer 1

Se X tem o valor de (-2).(-8) = 16
E Y tem o valor de 5.(-3) = -15
(X+Y) = 16+(-15) = 1
(X-Y) = 16-(-15) = 31
31•1 = 31

Answer 2

X=(-2)×(-8) e Y=5×(-3)

x= (-2)×(-8) = 16
y= 5×(-3) = -15

, calcule (X+Y) × (X-Y)

X+Y= 16+(-15) = 1
X-Y= 16-(-15) = 31

(X+Y) × (X-Y) = 1 × 31=31.