-0,5-(4y+12-2y^2-6y)=-0,5+2y-12+2y^2=1,5-12+2y^2
17 номер
1) 28а+42-12а
2)8х-64+8х=х-64
3)1.7а-6.8+3.6-1.2а=0.5-3.2
4)12х-9у-12у+7,2=19.2х-21у
5)-4.3х+2.4-5.8+2.6=-1.7-3.4
6)8/15(15/4м-5/16н)-3/20(20/3м-40/9)=2м-5/16н-м+40/9н=40/9-5/16=545/144
16 номер
1)2а
2)4х
3)0,4а-1.6
4)-1.5м-0.4
5)-0.2р-2.9d-1.2
1.
![( \sqrt{5} ) ^{x-6}\ \textless \ \frac{1}{5} ( 5^{ \frac{1}{2} } ) ^{x-6} \ \textless \ 5^{-1} 5^{ \frac{1}{2} *(x-6)} \ \textless \ 5^{-1}](https://tex.z-dn.net/?f=%28+%5Csqrt%7B5%7D+%29+%5E%7Bx-6%7D%5C+%5Ctextless+%5C++%5Cfrac%7B1%7D%7B5%7D+%0A%0A%0A%28+5%5E%7B+%5Cfrac%7B1%7D%7B2%7D+%7D+%29+%5E%7Bx-6%7D+%5C+%5Ctextless+%5C++5%5E%7B-1%7D++%0A%0A+5%5E%7B+%5Cfrac%7B1%7D%7B2%7D+%2A%28x-6%29%7D+%5C+%5Ctextless+%5C++5%5E%7B-1%7D+)
основание степени а=5, 5> 1. знак неравенства не меняем.
![\frac{1}{2} *(x-6)\ \textless \ -1 |*2](https://tex.z-dn.net/?f=+%5Cfrac%7B1%7D%7B2%7D+%2A%28x-6%29%5C+%5Ctextless+%5C+-1+%7C%2A2)
x-6<-2
x<-2+6
x<42.
![( \frac{2}{13} ) ^{ x^{2} -1} \geq 1](https://tex.z-dn.net/?f=%28+%5Cfrac%7B2%7D%7B13%7D+%29+%5E%7B+x%5E%7B2%7D+-1%7D++%5Cgeq+1)
![( \frac{2}{13} ) ^{ x^{2} -1} \geq ( \frac{2}{13} ) ^{0}](https://tex.z-dn.net/?f=%28+%5Cfrac%7B2%7D%7B13%7D+%29+%5E%7B+x%5E%7B2%7D+-1%7D++%5Cgeq+%28+%5Cfrac%7B2%7D%7B13%7D+%29+%5E%7B0%7D+)
основание степени а=2/13, 0<2/13<1. меняем знак неравенства.
x²-1≤0 метод интервалов:
(x-1)*(x+1)≤0
х-1=0 или х+1=0
x₁=-1. x₂=1
++++[-1]-----[1]++++>x
x∈[-1;1]