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anonymous

  • one year ago

PLEASE HELP!!! Factor completely x^2 + 20x − 36.

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  1. ckallerid
    • one year ago
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    Do you know how to split this into a binomial?

  2. anonymous
    • one year ago
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    no

  3. anonymous
    • one year ago
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    I was going to say (x+2)(x+18)

  4. anonymous
    • one year ago
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    But there is a minus

  5. anonymous
    • one year ago
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    so then what would it be?

  6. Nnesha
    • one year ago
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    check your equation plz

  7. anonymous
    • one year ago
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    that was the equation given to me one of my answers is prime, is that the answer?

  8. pooja195
    • one year ago
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    Orime would be correct

  9. Nnesha
    • one year ago
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    use the discriminant b^2 - 4ac

  10. pooja195
    • one year ago
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    *Prime there are no numbers that multiply to -36 but add to make 20

  11. anonymous
    • one year ago
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    okay thanks :)

  12. pooja195
    • one year ago
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    ax^2+bx+c=0 x^2 + 20x − 36. a*c <----36 x 1 =-36 b <----20

  13. mathstudent55
    • one year ago
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    You are trying to factor a trinomial of the form: \(x^2 + ax + b\) For this type of factoring, you need to find two numbers whose product is b and whose sum is a. In this case, you need two numbers whose product is -36 and whose sum is 20. If two such numbers do not exist, then the trinomial is not factorable, so it's prime.

  14. anonymous
    • one year ago
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    thanks

  15. Nnesha
    • one year ago
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    nvm

  16. mathstudent55
    • one year ago
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    Factors of -36 Sum of the factors -1, 36 35 -36, 1 -35 -18, 2 -16 -2, 18 16 -12, 3 -9 -3, 12 9 -9, 4 -5 -4, 9 5 -6, 6 0 As you can see, there are no two factors of -36 which have a sum of 20. That means this trinomial is not factorable. it is prime.

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