p = 1
p = -1
5p2 - 5 = 0
5p2 - 5 = 5 • (p2 - 1)
p + 1) • (p - 1)
5×(p+1)×(p-1)=0
5 = 0
p+1 = 0
p-1 = 0
p=1
p = 1
p = -1
5p2 - 5 = 0
5p2 - 5 = 5 • (p2 - 1)
p + 1) • (p - 1)
5×(p+1)×(p-1)=0
5 = 0
p+1 = 0
p = -1
p-1 = 0
p=1
p = 1
p = -1