Find the unknown (Math)

6p - p^3 / p + 4 = 0 可以寫成 -p^2+6p+4=0
根據公式
p= ( -6+_√6^2-4(-1)(4) )/2(-1)
=(-6+_√52)/-2
=3+_√13, 即係 p=3+√13 or 3-√13

6p - p^3 / p + 4 = 0 can write in -p^2+6p+4=0

p = ( -6+_√6^2-4(-1)(4) )/2(-1)
=(-6+_√52)/-2
=3+_√13
so p=3+√13 (or 3-√13 )