Hi!
In any quadratic in the form you have given ([tex]ax^2+bx+c=0[/tex]), the discriminant is ALWAYS
[tex]b^2-4ac[/tex]
Given the quadratic formula:
[tex]x=\frac{-b+/-\sqrt{b^2-4ac} }{2a}[/tex]
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The discriminant would be the part of the equation that is under the square root.
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Therefore, your answer is [tex]b^2-4ac[/tex]
