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anonymous

  • one year ago

Medal & fan. Determine the solution set of (x + 2)^2 = 36. Would i use foil here?

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  1. freckles
    • one year ago
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    Take square root of both sides.

  2. freckles
    • one year ago
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    you will wind up with two equations to solve x+2=6 or x+2=-6

  3. anonymous
    • one year ago
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    x=4 or x=-4?

  4. hybrik
    • one year ago
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    Yes, x = + or - 4 [Also known as -4,4]

  5. anonymous
    • one year ago
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    answer choices are: a.) (6,-8) b.) (4,-8) c.) (4,-6)

  6. hybrik
    • one year ago
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    What is the square root of 36?

  7. anonymous
    • one year ago
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    \[\pm6\]

  8. anonymous
    • one year ago
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    in this case negative

  9. hybrik
    • one year ago
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    So find what x+2 = 6 and x-2 = 6, solve and you get, x=4, and x=8

  10. anonymous
    • one year ago
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    its for sure positive 8?

  11. hybrik
    • one year ago
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    4,-8

  12. anonymous
    • one year ago
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    oh okay

  13. freckles
    • one year ago
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    \[x+2=6 \text{ or } x+2=-6 \\ \text{ subtracting 2 on both sides gives } \\ x=6-2 \text{ or } x=-6-2 \\ x=4 \text{ or } x=-8\]

  14. freckles
    • one year ago
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    not 8

  15. freckles
    • one year ago
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    pluggin in 8 yields (8+2)^2=36 which is not a true equation

  16. freckles
    • one year ago
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    (4+2)^2=36 is true (-8+2)^2=36 is also true @yungjvke

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