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Bananas1234

  • one year ago

Factor the expression. c^2 + 4c – 4

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  1. alekos
    • one year ago
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    Use the quadratic formula

  2. triciaal
    • one year ago
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    |dw:1433310676635:dw|

  3. triciaal
    • one year ago
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    |dw:1433310758978:dw|

  4. triciaal
    • one year ago
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    |dw:1433310845922:dw|

  5. triciaal
    • one year ago
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    any questions?

  6. Bananas1234
    • one year ago
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    here are my options: (c + 2)2 (c + 1)(c + 4) (c2 + 4)2 The expression cannot be factored because it is prime.

  7. Bananas1234
    • one year ago
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    @triciaal

  8. triciaal
    • one year ago
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    |dw:1433311170876:dw|

  9. triciaal
    • one year ago
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    I had an error with the sign so it did not factor

  10. triciaal
    • one year ago
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    but hope you understand the steps , please be more careful than I was

  11. Bananas1234
    • one year ago
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    no problem!! :)

  12. Bananas1234
    • one year ago
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    (c + 2)^2? @triciaal

  13. jim_thompson5910
    • one year ago
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    Change all copies of 'c' to 'x' c^2 + 4c – 4 ---> x^2 + 4x – 4 x^2 + 4x – 4 is the same as 1x^2 + 4x – 4 so it is in the form ax^2 + bx + c where a = 1, b = 4, c = -4 ------------------------------------------------------- Plug a = 1, b = 4, c = -4 into the discriminant formula D = b^2 - 4ac what do you get when you do so?

  14. Bananas1234
    • one year ago
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    1x^2 + 4x + -4?

  15. Bananas1234
    • one year ago
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    wait sorry wrong formula

  16. Bananas1234
    • one year ago
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    D = 4^2 - 4 times 1 times -4??

  17. jim_thompson5910
    • one year ago
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    Yes now evaluate that to get D = ???

  18. Bananas1234
    • one year ago
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    32??

  19. jim_thompson5910
    • one year ago
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    is that a perfect square?

  20. Bananas1234
    • one year ago
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    no.....

  21. jim_thompson5910
    • one year ago
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    since D = 32 is not a perfect square, that means the original expression cannot be factored. It is considered "prime"

  22. Bananas1234
    • one year ago
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    ohhh i see!!

  23. Bananas1234
    • one year ago
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    Thank you!!!

  24. jim_thompson5910
    • one year ago
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    yw

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