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anonymous

  • one year ago

What is the discriminant for the quadratic expression? 18x2 + 11x A. 49 B. 121 C. 193 D. 280

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  1. anonymous
    • one year ago
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    discriminant = b² - 4ac y = ax² + bx + c is the quadratic equation, so you have a = 18, b = 11, c = 0

  2. anonymous
    • one year ago
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    hld on sec

  3. Mertsj
    • one year ago
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    Discriminant is b^2-4ac

  4. Mertsj
    • one year ago
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    \[ax^2+bx+c\] \[18x^2+11x+0\]

  5. Mertsj
    • one year ago
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    a=18 b=11 c=0

  6. Mertsj
    • one year ago
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    Calculate b^2-4ac

  7. UsukiDoll
    • one year ago
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    the discriminant formula is b^2-4ac find the values based on the the standard quadratic equation ax^2+bx+c let a = 18,b=11, c =0 and plug it into the formula

  8. anonymous
    • one year ago
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    47x

  9. UsukiDoll
    • one year ago
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    we should just have a number after calculating the discriminant

  10. anonymous
    • one year ago
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    47

  11. anonymous
    • one year ago
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    b² - 4ac = 11² - 4(18)(0)

  12. anonymous
    • one year ago
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    The part after the subtraction sign comes out to 0 so you're left with 11²

  13. UsukiDoll
    • one year ago
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    anything multiplied by 0 is 0 so we are left with 11^2-0 =11^2 what's 11 x 11 ?

  14. anonymous
    • one year ago
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    121

  15. UsukiDoll
    • one year ago
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    yes that's correct

  16. anonymous
    • one year ago
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    thanks very much

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