1)2500*97:100=2325
2)350:600=7:12
3)64^5/15 64^1/3 4
36^9/18 = 36^1/2 = 6
9) y'=3x^2-6x+3=0
x^2-2x+1=0
(x-1)^2=0
x=1 Принадлежит [-2:2]
y(-2)=-24
y(1)=3
y(2)=4 Наиб.
10)lg( 3 x^2+12x+19}:{3x+4} )=lg10
3 x^{2} +12x+19=10*(3x+4)
3 x^{2} +12x+19=30x+40
3 x^{2} -18x-21=0
x^{2} -6x-7=0
x=7
x= -1