四よ次じ方ほう程てい式しきよじほうていしきMeanings1nounquartic equationmathematicsMathematical term for a polynomial equation of degree four.四よ次じ方ほう程てい式しきの解かいの公こう式しきは非ひ常じょうに複ふく雑ざつだ。The formula for solving quartic equations is extremely complex.
