Posted by **pj** on Thursday, January 29, 2009 at 6:53pm.

Quadratic equations can be solved by graphing, using the quadrat completing the square, and factoring. What are the pros and cons these methods? When might each method be most appropriate?

- Algebra Question -
**Damon**, Thursday, January 29, 2009 at 6:59pm
Factoring is quickest and best if simple integer factors are possible

The quadratic equation and completing the square are the same thing as far as I am concerned. This is the way to go if you have a calculator handy and the numbers are too nasty for factoring.

Use a graph if you want to see how the function is behaving as well as its zeros.

- Algebra Question -
**Reiny**, Thursday, January 29, 2009 at 7:02pm
If the numbers are reasonably small the first thing I try is factoring

If the coefficient of the square term is 1, and the middle term is even, then completing the square works great

For all other cases I simply use the quadratic formula, knowing that it always works.

One of my favourite questions when I was still teaching was to give 3 different quadratic equations, using a different method for each.

(The trick was that there was only one that factored, so it you used the quadratic formula for that one, you were out of options for the factoring type.)

## Answer this Question

## Related Questions

- ALGEBRA - Quadratic equations can be solved by graphing, using the quadratic ...
- ALGEBRA--MAT 117 - Quadratic equations can be solved by graphing, using the ...
- math 117 - Quadratic equations may be solved by graphing, using the quadratic ...
- Mat/117 DQ2 - Quadratic equations may be solved by graphing, using the ...
- algebra - Quadratic equations can be solved by graphing,using the quadratic ...
- algebra - Systems of equations can be solved by graphing or by using ...
- algebra - "Systems of equations can be solved by graphing or by using ...
- Algebra - I understand that systems of equations can be solved by graphing or by...
- algebra - o Systems of equations can be solved by graphing or by using ...
- Algebra - Systems of equations can be solved by graphing or by using ...

More Related Questions