<span>0,4+15+(-1,83n)=16+0,4−3,83n
</span><span>15,4 -1,83n=16,4−3,83n
-1,83n+3,83n=16,4-15,4
2n=1
n=1/2=0.5</span>
(c-5)^2/(2c+4)*2(2c+4)/(c-5)(c+5)=2(c-5)/(c+5)
2(7.5-5)/(7.5+5)=(2*2.5)/12.5=5/12.5=0.4
(x²-4)*2x (x-2)(x+2)*2x x-2
---------- = ---------------= ------
4x*(x+2) 4x*(x+2) 2
<span>25x² -(x+y)²=(5х-х-у)(5х+х+у)=(4х-у)(6х+у)</span>
3 т.к. он не удовлетворяет условию а<в<0