Explanation

Al-haitham is credited with significant advancements in optics and geometry related to conic sections, which are key to quadratic equations. Al-Khawarzimi made contributions to algebra but not specifically the general analytical solution method for quadratics as prominently as Al-haitham did in this context. Isaac Newton developed calculus, a later development beyond the initial introduction of these solutions. Pythagoras is known for geometry and theorems, not the systematic analytical solution of quadratic equations.