Roboguru

Pertanyaan

Akar-akar dari persamaan 2 x squared minus 3 x minus 9 equals 0 adalah x subscript 1 dan x subscript 2. Nilai dari x subscript 1 squared plus x subscript 2 squared adalah...

  1. 11 1 fourth

  2. 6 3 over 4

  3. 2 1 fourth

  4. negative 6 3 over 4

  5. negative 11 1 fourth

R. RGFLSATU

Master Teacher

Jawaban terverifikasi

Pembahasan

2 x squared minus 3 x minus 9 equals 0 rightwards arrow a equals 2 comma space b equals negative 3 comma space c equals negative 9  x 1 plus x 2 equals fraction numerator negative b over denominator a end fraction equals fraction numerator negative left parenthesis negative 3 right parenthesis over denominator 2 end fraction equals 3 over 2  x 1 times x 2 equals c over a equals fraction numerator negative 9 over denominator 2 end fraction  x subscript 1 squared plus x subscript 2 squared equals left parenthesis x subscript 1 plus x subscript 2 right parenthesis squared minus 2 left parenthesis x subscript 1. x subscript 2 right parenthesis  space space space space space space space space space space space space space space space equals open parentheses 3 over 2 close parentheses squared minus 2 open parentheses fraction numerator negative 9 over denominator 2 end fraction close parentheses equals 9 over 4 plus 9  space space space space space space space space space space space space space space space equals 45 over 4 equals 11 1 fourth

52

0.0 (0 rating)

Pertanyaan serupa

Jika x1​ dan x2​ adalah akar-akar dari x2−8x+2, nilai dari x1​1​+x2​1​ adalah... .

27

0.0

Jawaban terverifikasi

RUANGGURU HQ

Jl. Dr. Saharjo No.161, Manggarai Selatan, Tebet, Kota Jakarta Selatan, Daerah Khusus Ibukota Jakarta 12860

Coba GRATIS Aplikasi Ruangguru

Produk Ruangguru

Produk Lainnya

Hubungi Kami

Ruangguru WhatsApp

081578200000

Email info@ruangguru.com

info@ruangguru.com

Contact 02140008000

02140008000

Ikuti Kami

©2022 Ruangguru. All Rights Reserved PT. Ruang Raya Indonesia