( 3A - 3B ) / ( A^2 - B^2 ) = ( 3 * ( A - B )) / ( A - B)*( A + B ) =
= 3 / ( A + B )
Объяснение:
1,2, правильно 100%, надеюсь
2х-12=-34
2х=-34+12
2х=-22
х=-11
|x+1|>1,3
![\left \{ {{x+1\ \textgreater \ 1,3} \atop {-x-1\ \textgreater \ 1,3}} \right. \\ \\ x+1\ \textgreater \ 1,3 \\ x\ \textgreater \ 0,3 \\ \\ -x-1\ \textgreater \ 1,3 \\ -x\ \textgreater \ 2,3 \\ x\ \textless \ -2,3](https://tex.z-dn.net/?f=+%5Cleft+%5C%7B+%7B%7Bx%2B1%5C+%5Ctextgreater+%5C+1%2C3%7D+%5Catop+%7B-x-1%5C+%5Ctextgreater+%5C+1%2C3%7D%7D+%5Cright.++%5C%5C++%5C%5C+x%2B1%5C+%5Ctextgreater+%5C+1%2C3+%5C%5C+x%5C+%5Ctextgreater+%5C+0%2C3+%5C%5C++%5C%5C+-x-1%5C+%5Ctextgreater+%5C+1%2C3+%5C%5C+-x%5C+%5Ctextgreater+%5C+2%2C3+%5C%5C+x%5C+%5Ctextless+%5C+-2%2C3)
Ответ: x∈(-∞;-2,3)U(0,3;+∞)
Ответ:
Объяснение:
1. c10:c4=2,5c
2. 0,88y12:1,1y7=77y1,8
3. Нет
4. 98
5. 20y5x2
6. 72m4n2÷0=0
7. 66x*72x*(36x12)3*864x=-162
66x*72x*108x36*864x=-162
443 418 624 =-162*36
443 418 624x=−5 832
x=443 418 624÷−5 832=76 032