Posted by **Rose** on Monday, February 27, 2012 at 5:23pm.

How do you know if a quadratic equation will have one, two, or no solutions?Please give examples. How do you find a quadratic equation if you are only given the solution? Please give an example.Is it possible to have different quadratic equations with the same solution? Explain and please give example. Provide your classmate’s with one or two solutions with which they must create a quadratic equation.

- Mat/117 DQ1 -
**Damon**, Monday, February 27, 2012 at 6:22pm
You can tell by the discriminant

a x^2 + b x + c = 0

look at

b^2 - 4 ac

If positive, then two real solutions

If zero, then vertex on x axis and both solutions are the same

If negative, then no real solutions, solutions are complex numbers

for the rest, work up from factors

for example

(x-1)(x-2) = 0 two real x = 1 or 2

x^2 -3 x + 2 = 0

for example

(x-2)(x-2)

x^2 - 4 x + 4 = 0 one solution (or two both the same)

(x-i)(x+i) = 0

x^2 - i^2 = x^2+1 = 0 no real solutions

## Answer This Question

## Related Questions

- algebra II - How do you know if a quadratic equation will have one, two, or no ...
- algebra II - How do you know if a quadratic equation will have one, two, or no ...
- ALGEBRA-MAT117 - How do you know if a quadratic equation will have one, two, or ...
- ALGEBRA - How do you know if a quadratic equation will have one, two, or no ...
- Algebra - How do you know if a quadratic equation will have one, two, or no ...
- questions - 1.) Why are there usually two solutions in quadratic equations? 2...
- algebra - i have very little information in my math book on the following ...
- Quadratic -Make up a problem - I am supposed to write a quadratic equation in ...
- Mat/117 Concept - • If you are looking at a graph of a quadratic equation, how ...
- Math - Solve the given quadratic equation exactly using the quadratic formula. ...

More Related Questions