"hằng đẳng thức" meaning in Vietnamese

{
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        "2": "恆等式"
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      "expansion": "等式 (“equality”)",
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      "name": "vi-etym-sino"
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  ],
  "etymology_text": "Sino-Vietnamese word from 恆等式, composed of 恆 (“fixed”) and 等式 (“equality”)",
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        "3": "",
        "4": "",
        "head": "hằng đẳng thức",
        "tr": ""
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      "expansion": "hằng đẳng thức",
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    {
      "args": {
        "head": "hằng đẳng thức"
      },
      "expansion": "hằng đẳng thức",
      "name": "vi-noun"
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  ],
  "lang": "Vietnamese",
  "lang_code": "vi",
  "pos": "noun",
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            "Formal sciences",
            "Sciences",
            "All topics",
            "Fundamental"
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      ],
      "examples": [
        {
          "english": "the identities you should memorize",
          "text": "hằng đẳng thức đáng nhớ",
          "type": "example"
        }
      ],
      "glosses": [
        "an identity"
      ],
      "id": "en-hằng_đẳng_thức-vi-noun-eEZQwHkH",
      "links": [
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          "algebra",
          "algebra"
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          "identity",
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      "raw_glosses": [
        "(algebra) an identity"
      ],
      "related": [
        {
          "word": "hằng số"
        }
      ],
      "topics": [
        "algebra",
        "mathematics",
        "sciences"
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        "vi:Bảy hằng đẳng thức đáng nhớ",
        "vi:hằng đẳng thức"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[haŋ˨˩ ʔɗaŋ˧˩ tʰɨk̚˧˦]",
      "tags": [
        "Hà-Nội"
      ]
    },
    {
      "ipa": "[haŋ˦˩ ʔɗaŋ˧˨ tʰɨk̚˦˧˥]",
      "tags": [
        "Huế"
      ]
    },
    {
      "ipa": "[haŋ˨˩ ʔɗaŋ˨˩˦ tʰɨk̚˦˥]",
      "tags": [
        "Hồ-Chí-Minh-City"
      ]
    }
  ],
  "word": "hằng đẳng thức"
}

{
  "etymology_templates": [
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        "2": "fixed"
      },
      "expansion": "fixed",
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        "2": "equality"
      },
      "expansion": "equality",
      "name": "l"
    },
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        "2": "恆等式"
      },
      "expansion": "恆等式",
      "name": "m"
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      },
      "expansion": "恆 (“fixed”)",
      "name": "m"
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    {
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      },
      "expansion": "等式 (“equality”)",
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      "name": "vi-etym-sino"
    }
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  "etymology_text": "Sino-Vietnamese word from 恆等式, composed of 恆 (“fixed”) and 等式 (“equality”)",
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      },
      "expansion": "hằng đẳng thức",
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    {
      "args": {
        "head": "hằng đẳng thức"
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      "expansion": "hằng đẳng thức",
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  ],
  "lang": "Vietnamese",
  "lang_code": "vi",
  "pos": "noun",
  "related": [
    {
      "word": "hằng số"
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        "vi:Algebra"
      ],
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        {
          "english": "the identities you should memorize",
          "text": "hằng đẳng thức đáng nhớ",
          "type": "example"
        }
      ],
      "glosses": [
        "an identity"
      ],
      "links": [
        [
          "algebra",
          "algebra"
        ],
        [
          "identity",
          "identity#English"
        ]
      ],
      "raw_glosses": [
        "(algebra) an identity"
      ],
      "topics": [
        "algebra",
        "mathematics",
        "sciences"
      ],
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        "vi:Bảy hằng đẳng thức đáng nhớ",
        "vi:hằng đẳng thức"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[haŋ˨˩ ʔɗaŋ˧˩ tʰɨk̚˧˦]",
      "tags": [
        "Hà-Nội"
      ]
    },
    {
      "ipa": "[haŋ˦˩ ʔɗaŋ˧˨ tʰɨk̚˦˧˥]",
      "tags": [
        "Huế"
      ]
    },
    {
      "ipa": "[haŋ˨˩ ʔɗaŋ˨˩˦ tʰɨk̚˦˥]",
      "tags": [
        "Hồ-Chí-Minh-City"
      ]
    }
  ],
  "word": "hằng đẳng thức"
}