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
Find common denominator and expand
1 mark - 2
Simplify to standard quadratic form
2 marks - 3
Solve quadratic equation
1 mark - 4
State the roots
1 mark
Concepts used
quadratic equationsrational equationsstandard formsolving quadratics
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