Quadratic Equations

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Solving Quadratic Equations

A Quadratic Equation of the form: Ax2 + Bx + C = 0 can be solved for real values of x.

This page will solve for these values when the coefficients A,B, and C are entered in the text boxes below.


  • 2x2 + 5x =12 (shown)
  • 7x2=18x - 11
  • x2 - 12x + 35 = 0

Quadratic Equation:
Ax2 + Bx + C = 0

A =

B =

C =


X1 =

X2 =


Illinois Learning Standards

STATE GOAL 8: Use algebraic and analytical methods to identify and describe patterns and relationships in data, solve problems and predict results.

8.B.4a Represent algebraic concepts with physical materials, words, diagrams, tables, graphs, equations and inequalities and use appropriate technology.

8.B.4b Use the basic functions of absolute value, square root, linear, quadratic and step to describe numerical relationships.


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Email Jim Dildine
Date Last Modified: 8/31/99
James P. Dildine