Срочноо пожалуйстоо 5tg2x-tgx-4 = 0

Решение 5tg²x - tgx - 4 = 0 tgx = t 5t² - t - 4 = 0 D = 1 + 4*5*4 = 25 t₁ = (1 - 5)/10 t₁ = = - 2/5 t₂ = (1 + 5)/10 t₂ = 3/5 1)  tgx = - arctg(2/5) + πn, n ∈ Z 2)  tgx = 3/5 x = arctg(3/5) + πk, k ∈ Z