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tor23
@tor23
July 2022
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6 задание, алгебра егэ
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Darelin
Sin A=BC/AB=0,4⇒BC=0,4AB
AB²=BC²+AC²
AB²=(0,4AB)²+(3√21)²
AB²=0,16AB²+9*21
AB²-0,16AB²=189
0,84AB²=189
AB²=225
AB=15
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Answers & Comments
AB²=BC²+AC²
AB²=(0,4AB)²+(3√21)²
AB²=0,16AB²+9*21
AB²-0,16AB²=189
0,84AB²=189
AB²=225
AB=15