Jawab:
20
Penjelasan dengan langkah-langkah:
Persamaan kuadrat ax² + bx + c = 0 akar-akar nya α atau β.
x² + 4x - 2 = 0
α² + β² = (α + β)² - 2αβ
= (-b / a)² - 2(c / a)
= (-4 / 1)² - 2(-2 / 1)
= 20
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Jawab:
20
Penjelasan dengan langkah-langkah:
Persamaan kuadrat ax² + bx + c = 0 akar-akar nya α atau β.
x² + 4x - 2 = 0
α² + β² = (α + β)² - 2αβ
= (-b / a)² - 2(c / a)
= (-4 / 1)² - 2(-2 / 1)
= 20