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S=3 t=8 2st^2 - s^2 = ?
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S=3 t=8
2st^2 - s^2 = ?

User Pierangelo Dal Ben
by
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2 Answers

5 votes
2st^2-s^2
2x3x8^2-3^2
2x3x64-9
=375
User Jxgn
by
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2st^2-s^2=~2(3)(8)^2-(3)^2~=~2(3)(64)-9


=~6(64)-9~=~384-9~=~375

375 is the answer
User JPJens
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