三さん次じの多た項こう式しき

Meanings

1

noun

cubic polynomial; third order polynomial

computing

Technical term used in mathematics and computing for a polynomial of degree three.

paragraph, nape of neck, clause

式style, ceremony, rite

二に次じの多た項こう式しき
Refers to a quadratic polynomial (degree 2), while 三次の多項式 is degree 3.
三さん次じ方ほう程てい式しき
A cubic equation (set equal to zero), whereas 三次の多項式 is the polynomial expression itself.

Compound of 三次 (さんじ, 'third degree') + の (possessive particle) + 多項式 (たこうしき, 'polynomial').