Which method did Al-Khwarizmi use to teach problem-solving in 'Al-Kitāb al-Mukhtaṣar fī Ḥisāb al-Jabr wal-Muqābala'?

💡 Explanation

Al-Khwarizmi employed systematic algebraic manipulation using 'al-jabr' (restoring) and 'al-muqābala' (balancing) to solve equations because these methods clearly illustrated the process of equation simplification. Therefore, step-by-step algebraic manipulation is correct, rather than geometric proofs, approximation, or abacus, which represent different approaches.

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