3) =-2*√(9*0,02)=-2*3√0,02=-6√0,02
4)=4/9*√9*7= 4/9 *3√7=4/3√7
5)=3/7*√49*2=3/7*7*√2=3√2
6) =10*√0,01*3=10*0,1√3=√3
4y(x-2)-x(x-2)
(x-2)(4y-x)
(102-2)(-3-102)
100 * - 105= 10500
4х²+7х-11=0
Д=7²-4*4*(-11)=49+176=225=15²
х1=-7+15/8=8/8=1
х2=-7-15/8=-22/8=11/4=2 3/8
ответ:1; 2 3/8
X(x^2 -81) =0
x(x-9)(x+9) =0
x1= 0 x2= 9 x3= - 9