3x(x-3)= -4

Help!

Thanks

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- Jun 2nd 2010, 02:23 PMkelsikelsquadratic formula
3x(x-3)= -4

Help!

Thanks - Jun 2nd 2010, 02:25 PMpickslides
$\displaystyle 3x(x-3)= -4$

$\displaystyle 3x^2-9x= -4$

$\displaystyle 3x^2-9x+4= 0$

$\displaystyle a=3,b=-9,c=4$

Was that o.k? - Jun 2nd 2010, 02:26 PMPlato
- Jun 2nd 2010, 02:31 PMkelsikels
what about the second part?

- Jun 2nd 2010, 02:35 PMPlato
- Jun 2nd 2010, 02:38 PMe^(i*pi)
- Jun 2nd 2010, 02:40 PMpickslides
- Jun 2nd 2010, 03:01 PMbigwave
here's a graph of $\displaystyle 3x^2-9x+4= 0$ if it is of any interest

the x intercepts are not as obvious as they look.

as mentioned already the quadradic equation will give the intercepts

http://www2.wolframalpha.com/Calcula...15&w=300&h=186