Solving equations and inequalities common mistakes

Common mistakes

• Linear equations common mistake 1

  Writing a final answer without showing the method that justifies it. This can weaken answers for: [Foundation and Higher] Solve linear equations in one unknown algebraically, including equations with brackets..

  Fix itShow the method first, then give the final answer in the required form. Apply this directly to Linear equations.

• Linear equations common mistake 1

  Writing a final answer without showing the method that justifies it. This can weaken answers for: [Foundation and Higher] Find approximate solutions to linear equations using a graph..

  Fix itShow the method first, then give the final answer in the required form. Apply this directly to Linear equations.

• Linear equations common mistake 1

  Writing a final answer without showing the method that justifies it. This can weaken answers for: [Foundation and Higher] Include equations with the unknown on both sides where tier-appropriate..

  Fix itShow the method first, then give the final answer in the required form. Apply this directly to Linear equations.

• Quadratic equations common mistake 1

  Writing a final answer without showing the method that justifies it. This can weaken answers for: [Foundation and Higher] Solve quadratic equations algebraically by factorising, including rearranged equations where tier-appropriate..

  Fix itShow the method first, then give the final answer in the required form. Apply this directly to Quadratic equations.

• Quadratic equations common mistake 1

  Writing a final answer without showing the method that justifies it. This can weaken answers for: [Foundation and Higher] Find approximate quadratic solutions using a graph..

  Fix itShow the method first, then give the final answer in the required form. Apply this directly to Quadratic equations.

• Quadratic equations common mistake 1

  Writing a final answer without showing the method that justifies it. This can weaken answers for: [Higher only] Solve quadratic equations by completing the square and using the quadratic formula..

  Fix itShow the method first, then give the final answer in the required form. Apply this directly to Quadratic equations.

• Simultaneous equations common mistake 1

  Writing a final answer without showing the method that justifies it. This can weaken answers for: [Foundation and Higher] Solve two simultaneous linear equations in two variables algebraically..

  Fix itShow the method first, then give the final answer in the required form. Apply this directly to Simultaneous equations.

• Simultaneous equations common mistake 1

  Writing a final answer without showing the method that justifies it. This can weaken answers for: [Foundation and Higher] Find approximate solutions to simultaneous equations using a graph..

  Fix itShow the method first, then give the final answer in the required form. Apply this directly to Simultaneous equations.

• Simultaneous equations common mistake 1

  Writing a final answer without showing the method that justifies it. This can weaken answers for: [Higher only] Solve simultaneous equations involving one linear and one quadratic equation..

  Fix itShow the method first, then give the final answer in the required form. Apply this directly to Simultaneous equations.

• Iteration common mistake 1

  Writing a final answer without showing the method that justifies it. This can weaken answers for: [Higher only] Find approximate solutions to equations numerically using iteration..

  Fix itShow the method first, then give the final answer in the required form. Apply this directly to Iteration.