Algebraic Proof

Understanding Algebraic Proof

  • An algebraic proof involves proving statements by using algebraic manipulations.
  • These proofs can test understanding of the properties of numbers, algebraic manipulation, and logical thought processes.

Basic Elements of Proof

  • Statements: These are the mathematical expressions or equations that are the substance of the proof.
  • Assumptions or givens: These are the facts or conditions that you are allowed to accept as true without proof.
  • Logical reasoning: This is the method used to advance from the assumptions to the conclusion. It’s important to be clear and precise in your reasoning.


  • Substitution: This involves replacing variables with numbers or expressions in order to simplify a problem or prove a claim.
  • Simplification: This involves reducing an expression to its most basic form - for instance, by using BIDMAS (brackets, indices, division/multiplication, addition/subtraction) order of operations or by collecting like terms.

Example of Use

  • Justifying solutions: Whenever you solve an equation, you usually perform a series of steps that could qualify as a proof. By showing each step, you demonstrate that your solution is correct.

Key Steps in Algebraic Proof

  1. Understand the proposition: Deduce what needs to be proved.
  2. Formulate a plan: Think about the steps to take or strategies to use.
  3. Carry out the proof: Apply your plan, providing each step of your reasoning.
  4. Review and refine: Once a result is obtained, check your work and make sure your argument is clear and logical.

Remember, algebraic proofs require both algebraic skill and logical reasoning. They are a fundamental part of advanced mathematical study.