0580/22 Oct/Nov 2023, Question 21: Simultaneous Equations by Elimination
Cambridge IGCSE Mathematics 0580 · Paper 22 (Extended) · Calculator · 4 marks
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The question, in short
Solve y = x + 1 with y = x² + x − 3 to find the coordinates of both intersection points.
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Solution · 4 marks
- 1x + 1 = x² + x − 3
- 2x² − 4 = 0, so x = 2 or x = −2
- 3x = 2: y = 3; x = −2: y = −1
- 4(2, 3) and (−2, −1)
Answer(2, 3) and (−2, −1)
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Also searched as: 0580/22/O/N/23 · 0580_w23_qp_22 · 0580 w23 22 · question 21.
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