Question

Kuis +50:
(x-3)(x-5) = 8
x₁ + x₂ = ?

Answer 1

Penjelasan dengan langkah-langkah:

(x – 3)(x – 5) = 8

x(x – 5) – 3(x – 5) = 8

x² – 5x – 3x + 15 – 8 = 0

x² – 8x + 7 = 0

x² – 7x – x + 7 = 0

x(x – 7) – 1(x – 7) = 0

(x – 1)(x – 7) = 0

x₁ = 1

x₂ = 7

x₁ + x₂ = 1 + 7

x₁ + x₂ = 8

Answer 2

SOAL 1

(x - 3)(x - 5) = 8

x(x - 3) - 5(x - 3) = 8

x² - 3x - 5x + 15 = 8

x² - 3x - 5x + 15 - 8 = 0

x² - 8x + 7 = 0

x² - 7x - x + 7 = 0

(x - 1)(x - 7) = 0

x - 1 = 0

x₁ = 0 + 1

x₁ = 1

x - 7 = 0

x₂ = 0 + 7

x₂ = 7

x₁ + x₂

= 1 + 7

= 8

UwU