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ksusha1999grm
@ksusha1999grm
July 2022
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ПОМОГИТЕ ПОЖАЛУЙСТА!!!!
Упростить выражение:
(C-2)(c+3)-(c-1)^2+3(5+c)^2-6c
Сократить:
1)a+2b/a^2-4b^2
2)a^3-8/(a^2+2a+4)
3)x^3+1/x^2-x+1
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Якорь756
Verified answer
(c-2)(c+3)-(c-1)^2+3(5+c)^2-6c = c^2+3c-2c-6-(c^2-2c+1)+3(25+10c+c^2)-6c = c^2 +3c-2c-6-c^2+2c-1+75+30c+3c^2-6c=27c+68+3c2
1)a+2b/a^2-4b^2=a+2b/(a-2b)(a+2b) = 1/a-2b
2)a^3-8/(a^2+2a+4)=(a-2)(a^2+2a+4)/a^2+2a+4 = a-2
3)x^3+1/x^2-x+1=(x+1)(x^2-x+1)/x^2-x+1 = x+1
2 votes
Thanks 2
Юленька194
Номер 1. Упростить выражение
Номер 2. Сократить.
а)
б)
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1 votes
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Answers & Comments
Verified answer
(c-2)(c+3)-(c-1)^2+3(5+c)^2-6c = c^2+3c-2c-6-(c^2-2c+1)+3(25+10c+c^2)-6c = c^2 +3c-2c-6-c^2+2c-1+75+30c+3c^2-6c=27c+68+3c21)a+2b/a^2-4b^2=a+2b/(a-2b)(a+2b) = 1/a-2b
2)a^3-8/(a^2+2a+4)=(a-2)(a^2+2a+4)/a^2+2a+4 = a-2
3)x^3+1/x^2-x+1=(x+1)(x^2-x+1)/x^2-x+1 = x+1
Номер 2. Сократить.
а)
б)
в)