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Akar-akar persamaan kuadrat 2x2 − 5x + 6 = 0 adalah x1​ dan x2​ • Nilai dari x2​x1​​+x1​x2​​ adalah ...

Pertanyaan

Akar-akar persamaan kuadrat 2 x squared space minus space 5 x space plus space 6 space equals space 0 adalah straight x subscript 1 space dan space straight x subscript 2 • Nilai dari x subscript 1 over x subscript 2 plus fraction numerator begin display style x subscript 2 end style over denominator begin display style x subscript 1 end style end fraction adalah ...

  1. 1 half

  2. 1 third

  3. 1 over 6

  4. 1 over 12

  5. 1 over 18

H. Nufus

Master Teacher

Mahasiswa/Alumni Universitas Negeri Surabaya

Jawaban terverifikasi

Pembahasan

2 straight x squared space minus space 5 straight x space minus space 6 space equals space 0 space rightwards arrow space straight a space equals 2 semicolon space straight b space equals negative 5 semicolon space straight c equals 6  straight x subscript 1 plus straight x subscript 2 equals negative straight a over straight b equals 5 over 2  straight x subscript 1 space. space straight x subscript 2 equals straight c over straight a equals 6 over 2 equals 3  straight x subscript 1 over straight x subscript 2 plus straight x subscript 2 over straight x subscript 1 equals fraction numerator straight x subscript 1 squared plus straight x subscript 2 squared over denominator straight x subscript 1. straight x subscript 2 end subscript end fraction  equals fraction numerator open parentheses begin display style 5 over 3 end style close parentheses squared minus 2.3 over denominator 3 end fraction  equals fraction numerator begin display style 25 over 4 minus 6 over 1 end style over denominator 3 end fraction  equals fraction numerator 25 minus 24 over denominator 4 end fraction.1 third  equals 1 fourth.1 third equals 1 over 12

209

1.0 (1 rating)

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