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katya12345ketr
@katya12345ketr
July 2022
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разложите на множители a)ac+bc+2a+2b; б)a^3-2a^2+a-2; в)3x+9-xy-3y.Заранее спасибо
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naduchka01
A) ac+bc+2a+2b=c(a+b)+2(a+b)=(a+b)(c+2)
b) a^3-2a^2+a-2=a^2(a-2)+(a-2)=(a-2)(a^2+1)
в) 3x+9-xy-3y=3(x+3)-y(x+3)=(x+3)(3-y)
1 votes
Thanks 3
katya12345ketr
спасибо
katya12345ketr
а можете помочь?
katya12345ketr
упростите и вычеслите при x=-3. 5-(2+x)(2-x)
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Answers & Comments
b) a^3-2a^2+a-2=a^2(a-2)+(a-2)=(a-2)(a^2+1)
в) 3x+9-xy-3y=3(x+3)-y(x+3)=(x+3)(3-y)