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OpenStudy (snowcrystal):
Please help me! I will fan and medal!
Find the discrimination of each quadratic equation.
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OpenStudy (snowcrystal):
\[25b^2 - 20b = 0\]
OpenStudy (btaylor):
I think you mean the discriminant. The discriminant is of a polynomial \(ax^2+bx+c\) is found by \(\sqrt{b^2-4ac}\).
OpenStudy (snowcrystal):
It would look like this right???
\[\sqrt{-20^2 - 4* 25}\]
OpenStudy (snowcrystal):
its okay and it would be \[-20^2 -4 * 25 \] then right
OpenStudy (snowcrystal):
im so confused
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OpenStudy (snowcrystal):
\[-25 \pm \frac{ \sqrt{65} }{ 2 } \approx -25 \pm \frac{ 8 }{ 2 } = -25\pm 4\]
OpenStudy (anonymous):
Yes. That is correct.
OpenStudy (anonymous):
I am kind of getting confused. I am doing this subject too so I am trying ot help the best way I can.
OpenStudy (snowcrystal):
\[-25 \pm 4 =\]
-21 or -29
OpenStudy (anonymous):
Yeah. I think there is supposed to be two numbers at the end.
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OpenStudy (anonymous):
Let me double check.
OpenStudy (snowcrystal):
if it is a \[\pm\] it should be
random231 (random231):
|dw:1394904136671:dw|
THIS IS NOT THE CORRECT FORMULA!!!
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