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Автор - hari84

номер 94 задание 1и 3 пгмогите ПОЖАЛУЙСТА!!!!

Ответ

Автор - abdugafforovadilnoza

1) 2x^2-x-9x+3x^2=5x^2-10x      

5*(-2)^2-10*(-2)=5*4+20=20+20=40

3) -8a^5-4a^4+8a^3+8a^5=8a^3-4a^4

8*2^3-4*2^4=8*8-4*16=64-64=0

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