Comments by "Fhf Fhf" (@fhffhff) on "Timofeevna" channel.

  1. 16/(2√(a²-12²)+2)=12/a (2a-3)²=(a²-12²)•9,a≥12 -5@²-12a+9*145=0 a=15,S=(2+20)/2*12=132
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