curl --request POST \
  --url https://api.iotools.cloud/v1/tool/polynomial-factoring-calculator \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "coefficients": "1, 0, -3, 2"
}
'

{
  "tool": "polynomial-factoring-calculator",
  "tool_version": "1.0.2",
  "outputs": {
    "content": "1",
    "factoredForm": "(x - 1)^2(x + 2)",
    "roots": [
      {
        "root": "1",
        "multiplicity": "2",
        "linear-factor": "(x - 1)^2"
      },
      {
        "root": "-2",
        "multiplicity": "1",
        "linear-factor": "(x + 2)"
      }
    ],
    "remainder": "Yes — no remainder; the polynomial factors completely into rational linear terms."
  },
  "credits_used": 5,
  "credits_remaining": null
}