2t² - 12t + 16 > 0
t² - 6t + 8 > 0
(t - 2)(t - 4) > 0
+ - +
___________₀__________₀___________
2 4
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Ответ : t < 2 , t > 4
7х - 4 = х - 16
7х - х = - 16 + 4
6х = - 12
х = - 2
<u>проверка:</u>
7 * (- 2) - 4 = - 2 - 16
-14 - 4 = -2 - 16
- 18 = - 18
X²-3x+2=x²-5x+6
x²-3x-x²+5x=6-2
2x=4
x=4/2
x=2
16х^2-8х=-1
8х(2х-1)=-1
8х=-1 х=-1/8
2х-1=1
2х=1+1
2х=2
х=1