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nastia5071
@nastia5071
October 2021
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Упростите выражение:
с(3с-7)²-(8с²-(3с-1)(3с+1)с)
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zhenyaM2002
Verified answer
С(3с-7)²-(8с²-(3с-1)(3с+1)с) =
= с (9с²-42с + 49) - (8с²- с(9с²-1) =
=9с³-42с²+49с - (8с²-9с³+с)=
= 9с³-42с²+49с -8с²+9с³-с=
=18с³ -50c² +48c =
= 2c(9c²-25c+24)
2 votes
Thanks 2
nastia5071
Спасибо огромненькое)
zhenyaM2002
всегда пожалуйста)
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Answers & Comments
Verified answer
С(3с-7)²-(8с²-(3с-1)(3с+1)с) == с (9с²-42с + 49) - (8с²- с(9с²-1) =
=9с³-42с²+49с - (8с²-9с³+с)=
= 9с³-42с²+49с -8с²+9с³-с=
=18с³ -50c² +48c =
= 2c(9c²-25c+24)