Septic equation
In algebra, a septic equation is an equation of the form a x 7 + b x 6 + c x 5 + d x 4 + e x 3 + f x 2 + g x + h = 0 , {\displaystyle ax^{7}+bx^{6}+cx^{5}+dx^{4}+ex^{3}+fx^{2}+gx+h=0,\,} where a ≠ 0. A septic function is a function of the form f ( x ) = a x 7 + b x 6 + c x 5 + d x 4 + e x 3 + f x 2 + g x + h {\displaystyle f(x)=ax^{7}+bx^{6}+cx^{5}+dx^{4}+ex^{3}+fx^{2}+gx+h\,} where a ≠ 0.