Harriot, Thomas, Mss. 6784

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481
481 (241) 		482
482 (241v)
483
483 (242) 		484
484 (242v)
485
485 (243) 		486
486 (243v)
487
487 (244) 		488
488 (244v)
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489 (245) 		490
490 (245v)
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              <s xml:space="preserve">[
                <emph style="bf">Commentary:</emph>
              </s>
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            <p>
              <s xml:space="preserve"> Square roots of
                <math>
                  <mstyle>
                    <msqrt>
                      <mrow>
                        <mi>b</mi>
                        <mi>b</mi>
                        <mo>+</mo>
                        <mi>c</mi>
                        <mi>c</mi>
                      </mrow>
                    </msqrt>
                    <mo>+</mo>
                    <mn>2</mn>
                    <mi>b</mi>
                    <mi>c</mi>
                  </mstyle>
                </math>
              ,
                <math>
                  <mstyle>
                    <msqrt>
                      <mrow>
                        <mi>b</mi>
                        <mi>b</mi>
                        <mi>b</mi>
                        <mi>b</mi>
                        <mo>-</mo>
                        <mi>d</mi>
                        <mi>d</mi>
                        <mi>d</mi>
                        <mi>d</mi>
                      </mrow>
                    </msqrt>
                    <mo>+</mo>
                    <mn>2</mn>
                    <mi>b</mi>
                    <mi>b</mi>
                    <mi>b</mi>
                    <mi>d</mi>
                    <mo>-</mo>
                    <mn>2</mn>
                    <mi>b</mi>
                    <mi>d</mi>
                    <mi>d</mi>
                    <mi>d</mi>
                  </mstyle>
                </math>
              , and
                <math>
                  <mstyle>
                    <msqrt>
                      <mrow>
                        <mi>b</mi>
                        <mi>b</mi>
                        <mi>c</mi>
                        <mo>+</mo>
                        <mi>d</mi>
                        <mi>d</mi>
                        <mi>c</mi>
                      </mrow>
                    </msqrt>
                    <mo>+</mo>
                    <mn>4</mn>
                    <mi>d</mi>
                    <mi>c</mi>
                  </mstyle>
                </math>
              , by the general rule derived in Add MS 6788
                <ref target="http://echo.mpiwg-berlin.mpg.de/ECHOdocuView?url=/permanent/library/AYB35Z4D/&start=20&viewMode=image&pn=29"> f. </ref>
              (and elsewhere). In each case, the root is checked by multiplication. </s>
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