Wednesday

July 30, 2014

July 30, 2014

Posted by **debby** on Tuesday, February 7, 2012 at 6:53pm.

- algebra -
**Reiny**, Tuesday, February 7, 2012 at 7:09pmgraphing gives you a ball-park answer, even showing if there are any real solutions

If the equation starts with x^2 and the middle term is even, I ALWAYS use completing the square, it is faster than using the formula and gives you the reduced answer if it is irrational

I often do a quick calculation of the discriminant

b^2 - 4ac on my calculator.

If that answer is a perfect square, then my quadratic will factor,

If the coefficients are single digits I usually look for factors, takes just a few seconds

If the numbers are two digits or "unruly" I just go for the formula way.

This used to be a problem in the past but with today's calculators the difficulty becomes a mute point.

**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 Question - Quadratic equations can be solved by graphing, using the ...

Algebra Quadratic Equations - I am trying to define the different appraoches to ...

Algebra - Which is the easiest way to figure a quadratic equation; graphing, ...

Math - Algebra - A. Solve the following quadratic equations. Make sure to show ...

Algebra Quadratic Equations - What are the pros and cons of completing the ...

Algebra - I understand that systems of equations can be solved by graphing or by...