NumericalHard4 marks
Solve the quadratic equation (x − 2)² − 5x − 3 = 0 and give your answer correct to 3 significant figures.
Topic: Quadratic equations
Previous-year question practice database
Answer
Exam answer
x ≈ 8.89 or x ≈ 0.113.
Explanation
Expand: (x−2)²−5x−3=0 ⇒x²−9x+1=0. Quadratic formula x=[9±√77]/2.
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