Posted by **Erin** on Sunday, February 27, 2011 at 11:43pm.

Solving quadratic equations by graphing?

3. x2-4x + 6 = 0

4. x2-4x-1=0

5. 4x2-12x + 3 = 0

6. x2-2x-4=0

- Math -
**MathMate**, Monday, February 28, 2011 at 8:28am
You'll need a graphics calculator, and have the calculator plot those graphs.

The solutions are where the curve intersects the x-axis. You can refine the accuracy by zooming onto the intersection.

All of the above problems have two real solutions each, except for #3, which has no real zeroes (i.e. the roots are complex).

You are free to post your answers for a check if you wish. You can also check by solving them analytically using the quadratic equation.

If you do not have a graphics calculator, you can graph by paper and pencil with the same results.

## Answer this Question

## Related Questions

- MATH - Which method of solving quadratic equations should be used when only an ...
- Algebra Quadratic Equations - I am trying to define the different appraoches to ...
- advanced math - Hi, I am trying to solve graphing quadratic equations. One of ...
- algebra - Quadratic equations can be solved by graphing,using the quadratic ...
- math - Find the roots of the quadratic equations x^2 - 1/12x -1/12 = 0 ?
- math 117 - Quadratic equations may be solved by graphing, using the quadratic ...
- Math - Algebra - A. Solve the following quadratic equations. Make sure to show ...
- Math - I am having probles with solving systems of equations by graphing please ...
- Geometry - Which equation has exactly one real solution? A 4x^2– 12x– 9 = 0 B 4x...
- math - solving quadratic equations 8s^3=72s

More Related Questions