Quadratic Equation Solver - MathPapa

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Simplify: (Show steps) Show Step-By-Step Upgrade to Premium for Step-By-Step Was this helpful? YesNoThank you!Thank you. Please let us know if you have more feedback to help us improve: Submit FeedbackDon't see the feature you need? Please leave a suggestion: Submit FeedbackSolve for: Show Step-By-Step Upgrade to Premium for Step-By-Step x1=x2=x3= Evaluate!Window SizeXmin:Xmax:Ymin:Ymax: Redraw Graph Links Example: 3x^2-2x-1=0

Step-By-Step Example

Learn step-by-step how to solve quadratic equations!

Example (Click to try)

3x2−2x−1=0

Choose Your Method

There are different methods you can use to solve quadratic equations, depending on your particular problem.

Solve By Factoring

Example: 3x^2-2x-1=0

Complete The Square

Example: 3x^2-2x-1=0 (After you click the example, change the Method to 'Solve By Completing the Square'.)

Take the Square Root

Example: 2x^2=18

Quadratic Formula

Example: 4x^2-2x-1=0

About quadratic equations

Quadratic equations have an x^2 term, and can be rewritten to have the form: ax2+bx+c=0

Need more problem types? Try MathPapa Algebra Calculator

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Tag » How To Complete The Square Calculator