2025 · Standard · Set 4 · Part 2·Q33·5 marks

Triangles

Question

Express the equation ; as a quadratic equation in standard form. Hence, find the roots of the equation so formed.

Approach

Simplify LHS: Let , then equation becomes easier. Or directly: . Finding common denominator : . Expanding and simplifying leads to a quadratic equation. Solving gives the roots.

Step-by-step working

  1. 1

    Find common denominator and expand

    1 mark
  2. 2

    Simplify to standard quadratic form

    2 marks
  3. 3

    Solve quadratic equation

    1 mark
  4. 4

    State the roots

    1 mark

Concepts used

quadratic equationsrational equationsstandard formsolving quadratics

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