bc/2a+ 1/3a(b+√ b2-4ac)3 /88888a3 + 1/22b(b+√ b2-4ac)2 /88884a2b + (b+√ b2-4ac) /88882ac T.theodor 2022.8.6

x ≠ 0 c=R T.theodor 2022.8.6

y = √+α T.theodor 2022.8.6

cubic function α > 0, β,γ < 0 d<0 -b-2√ b2-3ac /3a < 0 α, β > 0, γ < 0 d>0 -b+2√ b2-3ac /3a < 0 T.theodor 2022.8.6

/a = b-c c = b-a, 0 a = c = b a = c, a,b,c ハ、Pythagorean triple 之時、solution ハ、有理数。 T.theodor 2022.8.6