hello, i need some one to help me through this problem, there are more but i figure if you work me through this one i should be able to get the others, but then agian i might find myself back here later tonight:-). I know i should probable not be asking to solve such a simple equation as this but i have my reasons. x^2+2x=5 i need to know which method ( factoring, square roots, or completing the square. ) and why and how to solve it that way. thanks a bunch in advance
I always look at the discriminant in the quadratic equation.
Obviously if you have a negative value it will have complex roots.
If the value is positive AND a square number - factorising is usually a suitable method.
If the value is positive but NOT a square number - you should be looking to use the quadratic formula (plus you've already done a bit of it
If the value is 0 - you have a repeated root so completing square would be best.
In your example:
So I would suggest you use the quadratic formula - which considering the solution has a root component is a good move.
guys if any body sees this again and can help please do! i gota have this done like pronto before tommarow i know i know its sunday why didnt you do it before? yeah well i get so freakin frustrated with it i get to the point i say screw it cause i cant get any body to explain some of the stuff in terms i can understand the problem i asked previously about i got but now i have another i need help with. thanks alot i know i seem like a noob but noobs need help too :-)