Log3\sqrt(5)+log1|3\sqrt(5)=log3\sqrt(5)-log3\sqrt(5)=0<span />
7-2(x-4.5)=6-4x
7-2x+9=6-4x
16-2x-6+4x=0
10+2x=0
2x=10
x=5
(2-x)(x+3x²)≥0
x(2-x)(1+3x)=0
x=0 x=2 x=-1/3
+ _ + _
-----------[-1/3]--------[0]----------[2]---------------
x∈(-∞;-1/3] U [0;2]
3x^2+1/4y^2
3/1x^2+1/4y^2
я дальше не помню