1,000 Perfect Weekends: Great Getaways Around the Globe

1,000 Perfect Weekends: Great Getaways Around the Globe

Matematika himpunan nilai x yang memenuhi persamaan √x²+4x-10=√14-2x adalah..​

himpunan nilai x yang memenuhi persamaan √x²+4x-10=√14-2x adalah..​

Jawaban:

a. {-8,3}

Penjelasan dengan langkah-langkah:

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[tex]\rm\sqrt{x^2 + 3x - 10} = \sqrt{14 - 2x}[/tex]

[tex]\rm\sqrt{x^2 + 3x - 10}^2 = \sqrt{14 - 2x}^2[/tex]

[tex]\rm x^2 + 3x - 10 = 14 - 2x[/tex]

[tex]\rm x^2 + 3x - 10 - 14 + 2x = 0[/tex]

[tex]\rm x^2 + 5x - 24 = 0[/tex]

[tex]\rm x^2 + 8x - 3x - 24 = 0[/tex]

[tex]\rm x \times (x + 8) - 3(x + 8) = 0[/tex]

[tex]\rm (x + 8) (x - 3) = 0[/tex]

Diperoleh:

x + 8 = 0

x = 0 - 8

x = - 8

[tex]\:[/tex]

x - 3 = 0

x = 0 + 3

x = 3

[tex]\:[/tex]

HP = {-8,3}

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