Question 1169889
<br>Easiest way was to solve on paper <br>

      *[illustration algebra1169889.jpg]

<br>
The two lines mid-page where I have {{{h^2-a^2}}} should both be {{{a^2-h^2}}}. I accidentally put them in wrong order ('a' is hypotenuse of the little triangle BCM, not 'h').