yang tahu tolong bantu yaa
Penjelasan dengan langkah-langkah:
2x² - 4x - 6 = 0
x² - 2x - 3 = 0
(x - 3)(x + 1) = 0
x - 3 = 0
x = 3
x₁ = 3
atau
x + 1 = 0
x = -1
x₂ = -1
no. 1
x₁² + x₂² = 3² + (-1)² = 9 + 1
x₁² + x₂² = 10
no. 2
2(x₁²) + 2(x₂)² = 2(3)² + 2(-1)²
2(x₁²) + 2(x₂)² = 18 + 2
2(x₁²) + 2(x₂)² = 20-
no. 3
1/x₁ + 1/x₂ = 1/3 + 1/(-1)
1/x₁ + 1/x₂ = 1/3 - 1
1/x₁ + 1/x₂ = 1/3 - 3/3
1/x₁ + 1/x₂ = -2/3
no. 4
1/(x₁)² + 1/(x₂)² = 1/(3²) + 1/(-1)³
1/(x₁)² + 1/(x₂)² = 1/9 + 1
1/(x₁)² + 1/(x₂)² = 1/9 + 9/9
1/(x₁)² + 1/(x₂)² = 10/9
" maaf kalau salah "
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