Răspuns:
Explicație pas cu pas:
a)
(4a - 2b + 5)^133 + (-4a + 2b - 5)^133
= (4a - 2b + 5)^133 + [(-1)*(4a - 2b + 5)]^133
= (4a - 2b + 5)^133 + (-1)^133*(4a - 2b + 5)^133
= (4a - 2b + 5)^133 - 1*(4a - 2b + 5)^133
= (4a - 2b + 5)^133 - (4a - 2b + 5)^133
= 0
b)
27^672 = (3^3)^672 = 3^2016
(2a - a^2 - 5)^2016 = (a^2 - 2a + 5)^2016
3^2016*(a^2 - 2a + 5)^2016 = (3a^2 - 6a + 15)^2016
(3a^2 - 6a + 15)^2016 - (3a^2 - 6a + 15)^2016 = 0
