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mathtard
Group Title
Determine the nature of solutions of the equation
x^23x+8=0
 3 years ago
 3 years ago
mathtard Group Title
Determine the nature of solutions of the equation x^23x+8=0
 3 years ago
 3 years ago

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fiddlearound Group TitleBest ResponseYou've already chosen the best response.0
you need to check the discriminant  know what that is ?
 3 years ago

fiddlearound Group TitleBest ResponseYou've already chosen the best response.0
are you familiar with the quadratic equation ?
 3 years ago

mathballet8888 Group TitleBest ResponseYou've already chosen the best response.2
use quadratic formula
 3 years ago

mathtard Group TitleBest ResponseYou've already chosen the best response.0
no not at all.
 3 years ago

fiddlearound Group TitleBest ResponseYou've already chosen the best response.0
ever seen this formula ? \[x=\frac{b \pm \sqrt{b^24ac}}{2a}\]
 3 years ago

fiddlearound Group TitleBest ResponseYou've already chosen the best response.0
http://en.wikipedia.org/wiki/Quadratic_equation
 3 years ago

mathballet8888 Group TitleBest ResponseYou've already chosen the best response.2
\[(b \pm \sqrt{b^{2}4ac})/2a\]
 3 years ago

fiddlearound Group TitleBest ResponseYou've already chosen the best response.0
In general: ax^2+bx+c=0 In your case: a=1 (the coefficient of x^2) b=3 (coefficient of x) c=8 Use these values and plug them into the discriminant (the thingy inside the square root). \[\Delta=b^24ac\] If the discriminant = 0, there is one real solution If the discriminant > 0, there are two real solutions If the discriminant < 0, there are no real solutions
 3 years ago
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