Algebra guides

Algebra uses symbols to represent numbers so you can solve equations, rewrite expressions, and describe relationships.

• How to Solve Linear Equations

  To solve a linear equation, simplify both sides, collect the variable on one side, and divide by its coefficient. Check by substituting the result.

• How to Solve Quadratic Equations

  A quadratic equation has degree 2. Write it as ax² + bx + c = 0, then factor, complete the square, or use the quadratic formula.