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Kuoministers

  • 3 years ago

can x^3 + 8 be factorised? if so it is using a3 + b3 = (a + b)(a2 – ab + b2)?

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  1. backpack799
    • 3 years ago
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    (x-2)(x^2 + 2x + 4)

  2. Kuoministers
    • 3 years ago
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    But the question is x^3 + 8 not minus?

  3. hartnn
    • 3 years ago
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    yes, and your are correct,a=x and b=2

  4. hartnn
    • 3 years ago
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    *you

  5. Kuoministers
    • 3 years ago
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    Well i was looking to find it in factored from not the answer

  6. Kuoministers
    • 3 years ago
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    form*

  7. hartnn
    • 3 years ago
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    yeah, i didn't give any answer... factored form will be ... ?

  8. hartnn
    • 3 years ago
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    x^3+2^3 = (...+...)(....-....+...)

  9. hba
    • 3 years ago
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    Well the formula are as follows, \[a^3 + b^3 = (a + b)(a^2 – ab + b^2)\] \[a^3 - b^3 = (a - b)(a^2 + ab + b^2)\]

  10. Kuoministers
    • 3 years ago
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    (x+2)(x^2- 2 + 4) Is this right?

  11. hartnn
    • 3 years ago
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    the 2nd term in 2nd bracket is incorrect.

  12. Kuoministers
    • 3 years ago
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    i mean 2x opps (x+2)(x^2- 2x + 4)

  13. hartnn
    • 3 years ago
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    yeah, now correct....

  14. hba
    • 3 years ago
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    Yeah right

  15. Kuoministers
    • 3 years ago
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    thanks

  16. hba
    • 3 years ago
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    Your'e welcome.

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