anonymous
  • anonymous
I. Given the following polynomial: II. Use the quadratic formula to solve the following:
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
help me i dont kno mathat all
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Nnesha
  • Nnesha
what's the equation ?
Nnesha
  • Nnesha
post ur question here :=)

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Nnesha
  • Nnesha
`Given the following polynomial:` ???
anonymous
  • anonymous
look at the attachment
Nnesha
  • Nnesha
i didn't find the equation can you please post it here ?
anonymous
  • anonymous
how do i do that?
Nnesha
  • Nnesha
like type in the equation toool ?
Nnesha
  • Nnesha
take a screenshot ?
anonymous
  • anonymous
 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:
Nnesha
  • Nnesha
what's the polynomial ?
Nnesha
  • Nnesha
there should be an equation Ax^2+Bx+C like this
anonymous
  • anonymous
2xexponet2+7x-15=0
Nnesha
  • Nnesha
\[\huge\rm 2x^2+7x-15=0\] 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
Nnesha
  • Nnesha
\(\huge\color{reD}{\rm b^2-4ac}\) `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)
Nnesha
  • Nnesha
substitute a b and c value into b^2 -4ac do you get 169 ?
anonymous
  • anonymous
idk how to domath miss
Nnesha
  • Nnesha
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 ?
anonymous
  • anonymous
2x is a 7x is b
Nnesha
  • Nnesha
just the coefficient 2 =a 7=b c = ?
anonymous
  • anonymous
15
Nnesha
  • Nnesha
-15
Nnesha
  • Nnesha
alright \[\huge\rm b^2-4ac\] substitute b a and c values then sovle
Nnesha
  • Nnesha
solve*
anonymous
  • anonymous
how
Nnesha
  • Nnesha
just replace b with 7 a with 2 c with -15
Nnesha
  • Nnesha
here is how i would replace b with 7...... \[\rm (7)^2-4ac\] ur turn replace a with 2 and c with -15
anonymous
  • anonymous
49-8-15 that what i got
Nnesha
  • Nnesha
it's 4 times a times c it would bbe \[49 -8(-15)\] now solve
Nnesha
  • Nnesha
hello ?
anonymous
  • anonymous
idk
Nnesha
  • Nnesha
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
anonymous
  • anonymous
56
Nnesha
  • Nnesha
that's not correct!
Nnesha
  • Nnesha
49 -8(-15) first multiply -8 times -15 then add 49
anonymous
  • anonymous
thats what i got both times
Nnesha
  • Nnesha
-8 times -15 = ?
anonymous
  • anonymous
1065
Nnesha
  • Nnesha
did you really get that ?
anonymous
  • anonymous
yea
Nnesha
  • Nnesha
guess what ... try again make sure you typed -8 times -15 into the calculator
anonymous
  • anonymous
120
Nnesha
  • Nnesha
yes right 49+120 = ? that would be discriminant
anonymous
  • anonymous
169
Nnesha
  • Nnesha
yes right so first sentence is right ? ` The value of the discriminant is 169`

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