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jazzyfa30

  • one year ago

Solve the following by factoring. Make sure to put the answer in the form " x = a or x =b" x^2 + 5x = 24

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  1. Pradius
    • one year ago
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    set the equation = 0 thats first step

  2. hartnn
    • one year ago
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    2 numbers whose sum is 5 and product is -24 are .. ?

  3. jazzyfa30
    • one year ago
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    idk can they add and subtract

  4. hartnn
    • one year ago
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    hint : one of the numbers is negative

  5. jazzyfa30
    • one year ago
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    (1,2,3,4,6,8,12,24)

  6. jazzyfa30
    • one year ago
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    2 +-3

  7. hartnn
    • one year ago
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    2-3 will be -1 how about 8 and 3, +8 and -3, sum =... ?

  8. jazzyfa30
    • one year ago
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    -5

  9. hartnn
    • one year ago
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    8+ (-3) will be +5 which we want...

  10. jazzyfa30
    • one year ago
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    ok

  11. hartnn
    • one year ago
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    8*(-3) =-24

  12. hartnn
    • one year ago
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    so, split up 5x as 8x-3x

  13. hartnn
    • one year ago
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    \(x^2+8x-3x-24=0\) can you factor now ?

  14. jazzyfa30
    • one year ago
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    (x+8)(x-3)

  15. hartnn
    • one year ago
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    \(\huge \color{red}\checkmark\)

  16. hartnn
    • one year ago
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    so, what are the values of x ?

  17. jazzyfa30
    • one year ago
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    -8 and 3

  18. hartnn
    • one year ago
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    you got it :)

  19. jazzyfa30
    • one year ago
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    confused i got it wrong

  20. hartnn
    • one year ago
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    x = 3 or x =-8 must be correct

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