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Topic: NS5.3.1 Real Numbers
Performs operations with surds and indices
Square Root Calculator & Solver
The square root calculator will reduce any square root to its simplest radical form as well as provide a brute force rounded approximation of any real or imaginary square root.
The Irrationality of Pi - The Code - Episode 1 - BBC Two
In episode one of The Code, Marcus du Sautoy explains the importance of irrational number pi and how any number you can possibly imagine will appear in the sequence somewhere.