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Russianrus2
@Russianrus2
July 2022
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Упростите выражение a) 5a(2-a)+(a-7)(a+4) б) (b-3)(b-4)-(b+4)^2 в) 20x+5(x-2)^2
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sasasasasasos
А) 10а-5а^2+a^2+4a-7a-28
7a-4a^2-28
б) b^2-4b-3b+12-(b^2+8b+16)
b^2-4b-3b+12-b^2-8b-16
-15b-b^2-4
в) 20x+5(x^2-4x+4)
20x+5x^2-20x+20
5x^2+20
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Answers & Comments
7a-4a^2-28
б) b^2-4b-3b+12-(b^2+8b+16)
b^2-4b-3b+12-b^2-8b-16
-15b-b^2-4
в) 20x+5(x^2-4x+4)
20x+5x^2-20x+20
5x^2+20