Harriot, Thomas, Mss. 6784

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              <s xml:space="preserve">[
                <emph style="bf">Commentary:</emph>
              </s>
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              <s xml:space="preserve"> Square roots of binomes of the third and fourth (
                <math>
                  <mstyle>
                    <msqrt>
                      <mrow>
                        <mi>b</mi>
                        <mi>b</mi>
                        <mi>c</mi>
                      </mrow>
                    </msqrt>
                    <mo>+</mo>
                    <msqrt>
                      <mrow>
                        <mi>b</mi>
                        <mi>b</mi>
                        <mi>c</mi>
                        <mo>-</mo>
                        <mi>d</mi>
                        <mi>d</mi>
                        <mi>c</mi>
                      </mrow>
                    </msqrt>
                  </mstyle>
                </math>
              and
                <math>
                  <mstyle>
                    <mi>b</mi>
                    <mo>+</mo>
                    <msqrt>
                      <mrow>
                        <mi>b</mi>
                        <mi>b</mi>
                        <mo>-</mo>
                        <mi>b</mi>
                        <mi>d</mi>
                      </mrow>
                    </msqrt>
                  </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 both cases the roots are checked by multiplication. </s>
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