NumericalModerate3 marks
Solve the following quadratic equation for x and give your answer correct to three significant figures : 2x² - 10x + 5 = 0 (Use mathematical tables if necessary)
Topic: Quadratic equations
Previous-year question practice database
Answer
Exam answer
x ≈ 4.44 or x ≈ 0.564.
Explanation
Quadratic formula for 2x²−10x+5=0: x=[10±√60]/4 = (5±√15)/2.
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