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anonymous

  • one year ago

Identify the factors of x2 - 8x - 20. (x + 4)(x - 5) (x + 5)(x - 4) (x - 10)(x + 2) (x - 2)(x + 10)

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  1. Nnesha
    • one year ago
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    4+ ways to factor quadratic equation leading coefficient is one so easy way to factor out is by using *AC method or headphone method whatever you wanna call it :D so find two number if you multiply them you should get product of AC and if you add or subtract them you should get middle term

  2. anonymous
    • one year ago
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    what?

  3. Nnesha
    • one year ago
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    ac and middle terms are \[\huge\rm Ax^2+Bx+C=0\] where a= leading coefficient b=middle term c=constant term

  4. Nnesha
    • one year ago
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    so in this equation x^2-8x-20 a=1 c=-20 b=-8 so find two number if you mtuliply them you should get -20 and if you add or subtract them you should get -8

  5. Nnesha
    • one year ago
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    multiply**

  6. anonymous
    • one year ago
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    10 and 2???

  7. Nnesha
    • one year ago
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    one of them should be negative bec when you multiply them you should get -20

  8. anonymous
    • one year ago
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    oh i mean -10 and 2

  9. Nnesha
    • one year ago
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    yep right !

  10. Nnesha
    • one year ago
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    so answer is ?

  11. anonymous
    • one year ago
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    c?

  12. Nnesha
    • one year ago
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    yep

  13. anonymous
    • one year ago
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    yay!!!

  14. Nnesha
    • one year ago
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    YAY! :=)

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