Which cubic did Fibonacci approximate in his book Flos?
Ax³ + 5x² + 2x = 20
Bx³ + 2x² + 10x = 20
Cx³ + 10x² + 2x = 20
Dx³ + 2x² + 20x = 10
Answer & Solution
Correct answer: B. x³ + 2x² + 10x = 20
Fibonacci closely approximated the positive root of x³ + 2x² + 10x = 20 in sexagesimal numerals.
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