gdyby x = 1, to:
1⁴ = 1*1*1*1 = 1
1 ≠ 0
gdyby x = 0, to:
0⁴ = 0*0*0*0 = 0
0 = 0
gdyby x = -1, to:
(-1)⁴ = (-1)*(-1)*(-1)*(-1) = 1
gdyby x = 2, to:
2⁴ = 2*2*2*2 = 16
16 ≠ 0
Odpowiedź: x = 0
