Exam Questions & Step-by-Step Markschemes (3 Problems)
Question 1 • 2023
4 Marks
Solve the quadratic equation x^2 - 4x - 8 = 0 using the quadratic formula. Give your answers correct to two decimal places (use \sqrt{3} \approx 1.732 ).
Answer: x = 5.46 \quad \text{or} \quad x = -1.46
Question 2 • 2024
4 Marks
Solve the following quadratic equation and give your answer correct to two decimal places: x^2 - 4x - 8 = 0
Answer: x \approx 5.46, \quad x \approx -1.46
Question 3 • 2024
3 Marks
Find the value of m for which the quadratic equation (m - 1)x^2 + 2(m - 1)x + 1 = 0 has real and equal roots, given m \ne 1 .
Answer: m = 2