1
1)x²=a
a²-100a+2304<0<br>D=10000-9216=784
√D=28
a=(100-28)/2=36⇒x²=36⇒x1=-6 U x2=6
a2=(100+28)/2=64⇒x²=64⇒x3=-8 U x4=8
+ _ + _ +
---------(-8)-------------(-6)--------(6)------------(8)-----------
-82)x³-17x²+82x-120>0
x²(x-3)-14x(x-3)+40(x-3)>0
(x-3)(x²-14x+40)>0
x-3=0⇒x=3
x²-14x+40=0
x1+x2=14 U x1*x2=40
x1=4 U x2=10
_ + _ +
--------(3)-----------(4)----------(10)--------------
310
Общего решения нет
2
{3(y+3)≤2(y-5)⇒3y-2y≤-10-9⇒y≤-19
{5(y+1)>4(y-4)⇒5y-4y>-16-5⇒y>-21
y∈(-21;-19]
x=-20 x=-19
2 целых решения