Matematika

Pertanyaan

tolong bantu mencari hp nya yg soal bawah
tolong bantu mencari hp nya yg soal bawah

1 Jawaban

  • y = x² - 2x + 1
    2 = x - y --> y = x - 2

    y = y
    x² - 2x + 1 = x - 2
    x² - 2x + 1 - x + 2 = 0
    x² - 3x + 3 = 0

    Cek nilai Diskriminan (D)
    D = b² - 4ac
    D = (-3)² - 4.1.3
    D = 9 - 12
    D = -3

    D < 0
    Akar2 imajiner

    ••
    rumus abc
    x1.2 = (-b ± √(b² - 4ac))/2a
    x1.2 = (3 ± √-3)/2
    x1.2 = (3 ± i√3)/2

    x1 = 3/2 + 1/2 i√3 ---> y1 = x + 2 = 7/2 + 1/2 i√3

    x2 = 3/2 - 1/2 i√3 ---> y2 = 7/2 - 1/2 i√3

    HP = {(x1,y1) , (x2,y2)}