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Matematika
Rixy05
Pertanyaan
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1 Jawaban
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1. Jawaban EngAbdu
x₁ + x₂ = -b/a = 5/1 = 5
→ x₁ . x₂ = c/a = 6/1 = 6
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b. x₁² + x₂²
→(x₁ + x₂)² - 2(x₁ . x₂) = 5² - 12 = 13
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c
→1/x₁ + 1/x₂ = (x₁ + x₂)/(x₁ . x₂) = 5/6
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d.x₁ /x₂ + x₂/x₁
→ (x₁² + x₂²)/(x₁ . x₂)
→[(x₁ + x₂)² - 2(x₁ . x₂)] /(x₁ . x₂)
→ 13/6
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e.) x₁² . x₂ + x₂².x₁
→ (x₁.x₂ )*(x₁ + x₂)
→ 6*5 = 30
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f.) 1/x₁² + 1/x₂²
→ (x₁² + x₂²)/(x₁² . x₂²)
→ [(x₁ + x₂)² - 2(x₁ . x₂)] /(x₁ . x₂)²
→ 13/36
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g. x₁² - x₂²
( x₁ - x₂) ( x₁ + x₂ )
√D/a * (-b/a)
√(b² - 4ac)/a * (-b/a)
√[25 - 4(1)(6)]/1) * 5
1 * 5 = 5
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h. x₁³ - x₂³
(x₁ - x₂) (x₁² + (x₁ . x₂) + x₂²)
1(13 + 6) = 19