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Ladanapol
@Ladanapol
July 2022
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Упростите выражение
a) (a^2-7)(a+2)-(2a-1)(a-14)
б) (a-2x)(x+4a)-7x(a+x)
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93931
(a²-7)(a+2)-(2a-1)(a-14) = a³+2a²-7a-14-(2a²-28a-a+14) =
a³+2a²-7a-14-2a²+28a+a-14 =
a³+22a-28.
(a-2x)(x+4a)-7x(a+x) = ax+4a
²-2x²-8ax-7ax-7x² =
4a²-14ax-9x².
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Answers & Comments
a³+2a²-7a-14-2a²+28a+a-14 = a³+22a-28.
(a-2x)(x+4a)-7x(a+x) = ax+4a²-2x²-8ax-7ax-7x² = 4a²-14ax-9x².