Summer has made me completely forget the simplest things! I have this worksheet to be completed for the summer and I'm stuck on quadratic equations. I completely forgot what to do and how to do it. For example I have this: 6x2-4=5x So lost! About the farthest I could get to was setting them all equal to zero. From there I factor?
Solving Quadratic Equations
- Thread starter Adnica
- Start date
Factoring may or may not be an option. The quadratic formula will always work. Rearrange by subtracting 5x from both sides, so that you are in the form ax^2 + bx + c = 0, then apply the formula:
6x2-4=5x
6x2- 5x - 4 = 0
mmm4444bot
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Do you remember the "Discriminant" (i.e., the radicand in the Quadratic Formula)?
There is a fairly straightforward test which uses the Discriminant to determine whether a 2nd-degree polynomial factors nicely.
Quadratic polynomials factor nicely when B^2 - 4AC is a perfect square.
Of course, if you have trouble remembering how to factor, the Quadratic Formula is always available, as is Completing the Square. :cool:
mmm4444bot
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Here are some online lessons about solving quadratic equations, for your review.