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Dimaalex
@Dimaalex
June 2022
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Алгебра 7кл. Простое умножение
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Ртуть3
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1)(c+2)(c-3)=c^2+2c-3c-6=c^2-c-6
2)(2a-1)(3a+4)=6a^2-3a+8a-4=6a^2+5a-4
3)(5x-2y)(4x-y)=20x^2-8xy-5xy+2y^2=20x^2-13xy+2y^2
4)(a-2)(a^2-3a+6)=a^3-2a^2-3a^2+6a+6a-12=a^3-5a^2+12a-12
1 votes
Thanks 1
Dimaalex
поздно, уже решил сам, ну хоть проверил
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Answers & Comments
Verified answer
1)(c+2)(c-3)=c^2+2c-3c-6=c^2-c-62)(2a-1)(3a+4)=6a^2-3a+8a-4=6a^2+5a-4
3)(5x-2y)(4x-y)=20x^2-8xy-5xy+2y^2=20x^2-13xy+2y^2
4)(a-2)(a^2-3a+6)=a^3-2a^2-3a^2+6a+6a-12=a^3-5a^2+12a-12