Al-Khwarizmi — "The square of the unknown is equal to the number."
The square of the unknown is equal to the number.
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More from Al-Khwarizmi
"The unknown must be isolated to find its value."
"The Hindus have a method of calculation which they call 'the nine figures'."
"The science of algebra is a noble one, necessary for men."
"When I considered what people generally want in calculating, I found that it always is a number."
"What is easiest and most useful in arithmetic, such as men frequently require in cases of inheritance, legacies, partition, lawsuits, and trade."
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