Harriot, Thomas - Mss. 6784

Harriot, Thomas, Mss. 6784

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439220

[Commentary:

Square roots of

\sqrt{b b + c c} + 2 b c

\sqrt{b b b b - d d d d} + 2 b b b d - 2 b d d d

, and

\sqrt{b b c + d d c} + 4 d c

, by the general rule derived in Add MS 6788 f. (and elsewhere). In each case, the root is checked by multiplication. ]