rw [c4, b2, show (24 : K) = 2 * 12 by norm_num, show (4 : K) = 2 * 2 by norm_num, hchar'', ← pow_two]
K : Type u
inst✝¹ : CommRing K
inst✝ : IsDomain K
e : Model K
h : ringChar K = 2
hchar' : ↑(ringChar K) = 2
hchar'' : 2 = 0
⊢ c4 e = 0 ↔ e.a1 = 0
K : Type u
inst✝¹ : CommRing K
inst✝ : IsDomain K
e : Model K
h : ringChar K = 2
hchar' : ↑(ringChar K) = 2
hchar'' : 2 = 0
⊢ (e.a1 ^ 2 + 0 * 0 * e.a2) ^ 2 - 0 * 12 * b4 e = 0 ↔ e.a1 = 0