Объяснение:
(30t^2-10t):(10t)+(6u+4):2=
=10t(3t-1):10t+2(3u+2):2=
=3t-1+3u+2
t=0,4
u= - 3
3t-1+3u+2=3×0,4-1+3×(-3)+2=
=1,2-1-9+2= - 6,8
Объяснение:
(30t^2-10t):(10t)+(6u+4):2=
=10t(3t-1):10t+2(3u+2):2=
=3t-1+3u+2
t=0,4
u= - 3
3t-1+3u+2=3×0,4-1+3×(-3)+2=
=1,2-1-9+2= - 6,8