Function binomialMatchQ

src/compute-engine/rubi/rubi-utils.ts:2187–2192

(u: Expression, x: string)

};
type GenTriParts = {
  a: Expression;
  b: Expression;
  c: Expression;
  n: Expression;
  q: Expression;
};

/** Rubi GeneralizedBinomialParts → {a,b,n,q}: u ≡ a·x^q + b·x^n, PosQ[n−q] */
function genBinomialPartsX(u: Expression, x: string): GenBinParts | null {