Update app.py

app.py

@@ -36,7 +36,7 @@ def solve_polynomial(degree, coeff_string):
         root_display = []
         for i, r in enumerate(roots):
             r_simplified = sp.nsimplify(r, rational=True)
-            root_display.append(f"r_{i+1} = {sp.latex(r_simplified)}")
+            root_display.append(f"r_{{{i+1}}} = {sp.latex(r_simplified)}")
 
         # Build steps
         steps_output = f"### 🧐 Polynomial Expression\n\n$$ {sp.latex(poly)} = 0 $$\n\n"
@@ -49,7 +49,7 @@ def solve_polynomial(degree, coeff_string):
         else:
             steps_output += f"### 🤷 No further factorization possible\n\n"
 
-        steps_output += f"### 🥮 Roots\n\n$$ {' \\quad '.join(root_display)} $$"
+        steps_output += "### 🥮 Roots\n\n$$ " + " \\quad ".join(root_display) + " $$"
 
         # Plot
         f_lambdified = sp.lambdify(x, simplified, modules=["numpy"])