no goals
R : Type u
S : Type v
a b c d : R
n m : ℕ
inst✝ : Semiring R
p q : R[X]
ι : Type ?u.832444
ha : a ≠ 0
⊢ degree (↑C a * X + ↑C b) = 1
rw [degree_add_eq_left_of_degree_lt <| degree_C_lt_degree_C_mul_X ha, degree_C_mul_X ha]