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anonymous

  • one year ago

I. Given the following polynomial: II. Use the quadratic formula to solve the following:

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  1. anonymous
    • one year ago
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    help me i dont kno mathat all

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  2. Nnesha
    • one year ago
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    what's the equation ?

  3. Nnesha
    • one year ago
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    post ur question here :=)

  4. Nnesha
    • one year ago
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    `Given the following polynomial:` ???

  5. anonymous
    • one year ago
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    look at the attachment

  6. Nnesha
    • one year ago
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    i didn't find the equation can you please post it here ?

  7. anonymous
    • one year ago
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    how do i do that?

  8. Nnesha
    • one year ago
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    like type in the equation toool ?

  9. Nnesha
    • one year ago
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    take a screenshot ?

  10. anonymous
    • one year ago
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     The value of the discriminant is 169.  There are 2 real roots.  There are 2 irrational roots.  The graph intersects the y-axis twice.  The parabola is directed upward.  The axis of symmetry is located at  The vertex is located at:  The roots are:  The graph intersects the y axis at (0, -15).  The graph intersects the x-axis at (-5, 0) and (1.5, 0) II. Use the quadratic formula to solve the following:

  11. Nnesha
    • one year ago
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    what's the polynomial ?

  12. Nnesha
    • one year ago
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    there should be an equation Ax^2+Bx+C like this

  13. anonymous
    • one year ago
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    2xexponet2+7x-15=0

  14. Nnesha
    • one year ago
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    \[\huge\rm 2x^2+7x-15=0\] quadratic equation ax^2+bx+c quadratic equation where a=leading coefficient b=middle term c-constant term so what is a b and c in that equation ? \[\huge\rm x=\frac{ -b \pm \sqrt{b^2-4ac} }{ 2a }\]quadratic formula

  15. Nnesha
    • one year ago
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    \(\huge\color{reD}{\rm b^2-4ac}\) `Discriminant` you can use this to find if the equation is factorable or not if ` b^2-4ac > 0` then there are 2 real zeros if ` b^2-4ac = 0` then there is one real root if ` b^2-4ac < 0` then you will get two complex roots (no -x-intercept)

  16. Nnesha
    • one year ago
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    substitute a b and c value into b^2 -4ac do you get 169 ?

  17. anonymous
    • one year ago
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    idk how to domath miss

  18. Nnesha
    • one year ago
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    Ax^2+Bx+C standard form equation of parabola where a = leading coefficient b= middle term c=constant term now look at this equation 2x^2+7x-15 what is a b and c ?

  19. anonymous
    • one year ago
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    2x is a 7x is b

  20. Nnesha
    • one year ago
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    just the coefficient 2 =a 7=b c = ?

  21. anonymous
    • one year ago
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    15

  22. Nnesha
    • one year ago
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    -15

  23. Nnesha
    • one year ago
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    alright \[\huge\rm b^2-4ac\] substitute b a and c values then sovle

  24. Nnesha
    • one year ago
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    solve*

  25. anonymous
    • one year ago
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    how

  26. Nnesha
    • one year ago
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    just replace b with 7 a with 2 c with -15

  27. Nnesha
    • one year ago
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    here is how i would replace b with 7...... \[\rm (7)^2-4ac\] ur turn replace a with 2 and c with -15

  28. anonymous
    • one year ago
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    49-8-15 that what i got

  29. Nnesha
    • one year ago
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    it's 4 times a times c it would bbe \[49 -8(-15)\] now solve

  30. Nnesha
    • one year ago
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    hello ?

  31. anonymous
    • one year ago
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    idk

  32. Nnesha
    • one year ago
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    that's not an answer you don't know or you don't want to do it ? you can use calculator just put 49-8(-15) into the calculator that's it

  33. anonymous
    • one year ago
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    56

  34. Nnesha
    • one year ago
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    that's not correct!

  35. Nnesha
    • one year ago
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    49 -8(-15) first multiply -8 times -15 then add 49

  36. anonymous
    • one year ago
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    thats what i got both times

  37. Nnesha
    • one year ago
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    -8 times -15 = ?

  38. anonymous
    • one year ago
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    1065

  39. Nnesha
    • one year ago
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    did you really get that ?

  40. anonymous
    • one year ago
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    yea

  41. Nnesha
    • one year ago
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    guess what ... try again make sure you typed -8 times -15 into the calculator

  42. anonymous
    • one year ago
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    120

  43. Nnesha
    • one year ago
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    yes right 49+120 = ? that would be discriminant

  44. anonymous
    • one year ago
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    169

  45. Nnesha
    • one year ago
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    yes right so first sentence is right ? ` The value of the discriminant is 169`

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