If \( b \) is a mean proportional between \( a \) and \( c \), prove that
\[
\frac{-a^{2}-b^{2}+... VIDEO
If \( b \) is a mean proportional between \( a \) and \( c \), prove thathttps://bit.ly/YTAI_PWAP https://www.pw.live
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\[
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