Jawab:

A. Hp = {1, -1}

B. Hp = {-1/2}

C. Hp = {-2, 1/3}

D. Hp = {1 1/2, -1}

Penjelasan dengan langkah-langkah:

A. X² - 1 = 0

a = 1, b = 0, c = -1

abc = -b±√b²-4ac / 2a

abc = -0±√0²-(4×1×-1) / 2×1

abc = -0±√0-(-4) / 2×1

abc = -0±√4 / 2

Hp = {2/2, -2/2}

Hp = {1, -1}

B. 4x² + 4x + 1 = 0

a = 4, b = 4, c = 1

abc = -b±√b²-4ac / 2a

abc = -4±√4²-(4×4×1) / 2×4

abc = -4±√16-16 / 8

abc = -4±√0 / 8

Diskriminan = 0 berarti cuma ada 1 himpunan penyelesaian

Hp = {-4/8}

Hp = {-1/2}

C. -3x² - 5x + 2 = 0

3x² + 5x - 2 = 0

a = 3, b = 5, c = -2

abc = -b±√b²-4ac / 2a

abc = -5±√5²-(4×3×-2) / 2×3

abc = -5±√25-(-24) / 2×3

abc = -5±√49 / 6

abc = -5±7 / 6

Hp = {-12/6, 2/6}

Hp = {-2, 1/3}

D. 2x² - x - 3 = 0

a = 2, b = -1, c = -3

abc = -b±√b²-4ac / 2a

abc = -(-1)±√(-1)²-(4×2×-3) / 2×2

abc = 1±√1-(-24) / 4

abc = 1±√25 / 4

abc = 1±5 / 4

Hp = {1+5/4, 1-5/4}

Hp = {6/4, -4/4}

Hp = {1 1/2, -1}

Gampang

<(7o7)>