Ha, men tushuntirib bera olaman, nega tenglamaning 2x^2 = 4 ning ikkita yechimi bor. tenglamaning ikkala tomonining kvadrat ildizini olsak x^2 = 2, biz quyidagilarni olamiz: x. x. = √2 Mutlaq qiymat belgisi (x. x. x.) tenglamaning yechimi musbat yoki manfiy bo'lishi mumkinligini ko'rsatadi. Buning sababi, musbat sonning kvadrat va manfiy sonning kvadrat ikkalasi ham musbat natijani beradi. Shuning uchun, x ning ikkita mumkin bo'lgan qiymati bor, ular tenglamani qondiradi 2x^2 = 4: x = √2 va x = -√2. x ning kvadratining ikkala qiymati ham 2 natijasini beradi, 2 ga ko'paytirilganda 4 ga teng.
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