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Mavelll
@Mavelll
July 2022
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Упростите выражение : 2a(3a-5)-(a-3)(a-7)
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rrrrtttt01
2a*(3a-5)-(a-3)*(a-7)=6a^2-10a-(a^2-10a+21)=6a^2-10a-a^2+10a-21=5a^2-21
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