X² – 2y – 8 = 0tentukan​

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X² – 2y – 8 = 0tentukan​

Mapel : Matematika

Jenjang : SMA

Kelas : 10

Kode Kategorisasi : 10.2.2

Materi : Bab 2 – Bentuk Akar, Logaritma, Eksponen

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 {x}^{2} - 2x - 8 = 0 \ {x}^{2} + 2x - 4x - 8 = 0 \ (x + 2)(x - 4) = 0 \ sf bold{ purple{x_1 = - 2 : : : x_2 = 4}}

Maka,

x_1 {}^{2} = ( - 2 {)}^{2} = 4 \ x_2 {}^{2} = {4}^{2} = 16 \ sf : sehingga \ x_1 {}^{2} + x_2 {}^{2} \ = 4 + 16 \ = boxed{ bold{ red{20}}}

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#LearnWithBrainly

(X1 + X2)² – 2(X1.X2)

Jawab

(2)² -2(-8)

= 4 + 16

= 20

Kesimpulan

Jawaban yang tepat adalah 20