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chicagochica5

  • 2 years ago

Solve the equation using square roots.

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  1. chicagochica5
    • 2 years ago
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  2. miicchi
    • 2 years ago
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    x^2 - 9 = 0 --> x^2 = 9 x = ±√9 --> x = ±3

  3. febylailani
    • 2 years ago
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    \[x ^{2} = 9\] so , can u find the result by yourself? ;)

  4. chicagochica5
    • 2 years ago
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    I dont know how to find the answer @febylailani, @miicchi

  5. miicchi
    • 2 years ago
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    i just showed you. [: i wrote x squared as x^2. x^2 -9 = 0 --> add 9 on both sides so that it becomes x^2 = 9. to check the answer i gave, just solve 3^2, or 3 * 3, and you'll get 9. so the answer is ±3. or do you have to graph it as well?

  6. febylailani
    • 2 years ago
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    @miicchi found the answer. every square root has two answer. \[x ^{2} = 9\] \[x = \sqrt{9}\] x = \[\pm 3\] x = 3 or x = -3 got it?

  7. chicagochica5
    • 2 years ago
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    A. –3, 3 B. –9, 9 D. no real number solutions C. \[-\sqrt{3}, \sqrt{3}\]

  8. chicagochica5
    • 2 years ago
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    @miicchi, @febylailani , So the answer would be A?

  9. miicchi
    • 2 years ago
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    yes [:

  10. chicagochica5
    • 2 years ago
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    Thank you @miicchi and @febylailani

  11. febylailani
    • 2 years ago
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    yup :)

  12. febylailani
    • 2 years ago
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    uwc :)

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