0580/12 May/Jun 2022, Question 17: Solving Linear Equations
Cambridge IGCSE Mathematics 0580 · Paper 12 (Core) · Calculator · 1 mark
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The question, in short
Solve for x in the equation 9ˣ × 9² = 9¹² using index laws.
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Solution · 1 mark
- 19ˣ × 9² = 9ˣ⁺²
- 2x + 2 = 12, so x = 10
Answer10
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