"complete the square" meaning in English

{
  "forms": [
    {
      "form": "completes the square",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "completing the square",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "completed the square",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "completed the square",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "completes the square",
        "2": "completing the square",
        "3": "completed the square"
      },
      "expansion": "complete the square (third-person singular simple present completes the square, present participle completing the square, simple past and past participle completed the square)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Mathematics",
          "orig": "en:Mathematics",
          "parents": [
            "Formal sciences",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "To write a quadratic polynomial in terms of the square of a binomial."
      ],
      "id": "en-complete_the_square-en-verb-lEL~mQae",
      "links": [
        [
          "mathematics",
          "mathematics"
        ],
        [
          "quadratic",
          "quadratic"
        ],
        [
          "polynomial",
          "polynomial"
        ],
        [
          "square",
          "square#English:_power"
        ],
        [
          "binomial",
          "binomial"
        ]
      ],
      "raw_glosses": [
        "(mathematics) To write a quadratic polynomial in terms of the square of a binomial."
      ],
      "topics": [
        "mathematics",
        "sciences"
      ],
      "translations": [
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "Translations",
          "word": "täydentää neliöksi"
        },
        {
          "code": "de",
          "lang": "German",
          "sense": "Translations",
          "word": "quadratisch ergänzen"
        },
        {
          "code": "pl",
          "lang": "Polish",
          "sense": "Translations",
          "tags": [
            "perfective"
          ],
          "word": "ukończyć kwadrat"
        }
      ]
    }
  ],
  "word": "complete the square"
}

{
  "forms": [
    {
      "form": "completes the square",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "completing the square",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "completed the square",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "completed the square",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "completes the square",
        "2": "completing the square",
        "3": "completed the square"
      },
      "expansion": "complete the square (third-person singular simple present completes the square, present participle completing the square, simple past and past participle completed the square)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English verbs",
        "Translation table header lacks gloss",
        "en:Mathematics"
      ],
      "glosses": [
        "To write a quadratic polynomial in terms of the square of a binomial."
      ],
      "links": [
        [
          "mathematics",
          "mathematics"
        ],
        [
          "quadratic",
          "quadratic"
        ],
        [
          "polynomial",
          "polynomial"
        ],
        [
          "square",
          "square#English:_power"
        ],
        [
          "binomial",
          "binomial"
        ]
      ],
      "raw_glosses": [
        "(mathematics) To write a quadratic polynomial in terms of the square of a binomial."
      ],
      "topics": [
        "mathematics",
        "sciences"
      ]
    }
  ],
  "translations": [
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "Translations",
      "word": "täydentää neliöksi"
    },
    {
      "code": "de",
      "lang": "German",
      "sense": "Translations",
      "word": "quadratisch ergänzen"
    },
    {
      "code": "pl",
      "lang": "Polish",
      "sense": "Translations",
      "tags": [
        "perfective"
      ],
      "word": "ukończyć kwadrat"
    }
  ],
  "word": "complete the square"
}