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bridgetolivares

  • 4 years ago

i dont think this is correct but solve for x, i will draw out my problem and work.

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  1. bridgetolivares
    • 4 years ago
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    |dw:1335728748154:dw|

  2. nbouscal
    • 4 years ago
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    What is the original problem? \(-4\sqrt{x+9}=20\)?

  3. bridgetolivares
    • 4 years ago
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    yes

  4. nbouscal
    • 4 years ago
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    Okay. You can't add 4, because it's \(-4\sqrt{x+9}\), not \(-4+\sqrt{x+9}\). You can divide, though, which will give you \(\sqrt{x+9}=-5\), then square both sides to get \(x+9=25\), so \(x=16\).

  5. bridgetolivares
    • 4 years ago
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    ahh i see. thank you.

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