( 1/4 ) ^ ( 4x - 13 ) = 1/64
( 1/4 ) ^ ( 4x - 13 ) = ( 1/4 ) ^ 3
4x - 13 = 3
4x = 16
X = 4
1/x+x^2/x+2.5x/x=0;
x^2+2.5x+1=0; x≠0;
D=2.5^2-4=6.25-4=2.25=1.5^2;
x1=(-2.5-1.5)/2=2;
x2=(-2.5+1.5)/2=-1/2;
1/2^2+2^2=1/4+4=4.25;
2^2+1/4=4.25;
Ответ: 4,25
(У)-2 будет(х) 3, -3 будет 1)
Y=8+x
2×{8+x}+2x=60
16+2x+2x=60
4x=60-16=44
x=44/4=11
y=8+11=19