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quickstudent

  • one year ago

Can someone please help me with guess and check factoring?

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  1. quickstudent
    • one year ago
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    @Nnesha

  2. quickstudent
    • one year ago
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    @Nnesha ? I need your help

  3. anonymous
    • one year ago
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    whats the problem

  4. quickstudent
    • one year ago
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    In my homework, I'm supposed to factor the expression x^2 + 8x - 9 using the guess and check method. I know that that means I have to find two numbers that add up make the second term and multiply to make the third term. But I can't think of any numbers that add up to 8 and multiply to -9. I don't know what to do now.

  5. Nnesha
    • one year ago
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    factors of 9 are 1 ,3 9 what two number would you multiply to get -9 but when u add/subtract them you should 8

  6. Nnesha
    • one year ago
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    guess and check so play with signs one of the number suppose to be negative

  7. quickstudent
    • one year ago
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    Wait, in the guess and check method you can subtract also?

  8. Nnesha
    • one year ago
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    yes you can you can add or subtract both numbers to get the middle term (b which is 8 in this equation )

  9. quickstudent
    • one year ago
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    Oh I got it! -1 and 9. -1 + 9 = 8, and -1 * 9 = -9

  10. Nnesha
    • one year ago
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    \(\huge\color{green}{\checkmark}\) right :=)

  11. quickstudent
    • one year ago
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    So the factors should be: (x - 1) (x + 9) Correct?

  12. Nnesha
    • one year ago
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    right leading coefficient is one so you can write it as (x + (1st number)) (x+ (2nd number)) good job! :=)

  13. quickstudent
    • one year ago
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    Thanks Didi! :D

  14. Nnesha
    • one year ago
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    np :=) didi ;D

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