Function pseudoBinomialPartsX

src/compute-engine/rubi/rubi-utils.ts:2067–2080

Rubi PseudoBinomialParts → {a,1,c,d,n}: u ≡ a + (c+d·x)^n, n > 2

(u: Expression, x: string)

        return t === null ? null : scaleTri(scale, t);
      }
      if (dep.length === 2) {
        const p1 = binomialPartsX(dep[0], x);
        const p2 = binomialPartsX(dep[1], x);
        if (p1 === null || p2 === null || !zeroQ(p1.n.sub(p2.n))) return null;
        const mid = p1.a.mul(p2.b).add(p1.b.mul(p2.a)).evaluate();
        if (zeroQ(mid)) return null;
        return scaleTri(scale, {
          a: p1.a.mul(p2.a).evaluate(),
          b: mid,
          c: p1.b.mul(p2.b).evaluate(),
          n: p1.n,
        });
      }
      return null;
    }
    case 'Add':
    case 'Subtract': {