(5x-2)(2-4x)=10x-20x²-4+8x=-20x²+18x-4
(3n+14)/(n+2)=3+8/(n+2)
n=2 или n=6
Log4(log5(5^2)) = log2^2(2) = 0.5
(x+9y)²-(9x+y)²= (x+9y+9x+y)(x+9y-9x-y)=(10x+10y)(-8x+8y)=80(x+y)(y-x)
16x^2+24x+9+9x^2-1-9=0
25^2+24x-1=0
D=576+100=676
x1=-24-26/50=-1
x2=-24+26/50= 1/25