При А равном -15, пожалуйста
1) (150)^(3/2):(6^(3/2)=(150/6)^(3/2)=(25)^(3/2)=((5^2))^(3/2)=5^3=125
3)(2/3)^(-2)-(1/27)^(1/3)+3*(589)^0=(3/2)^2-∛(1/27)+3*1=9/4-1/3+3=5+1/4-1/3=5-1/12=4+11/12
4) (∛128+∛1/4):∛2=∛128/∛2+∛1/4/∛2=∛128/2+∛1/4/2=∛64+∛1/8=4+1/2
5) (12^(2/3)*(3^(7/3)):4^(-1/3)=(3^(2/3)*4^(2/3)*(3^(7/3)*4^(1/3)=27*4=108
3(^2/3)*3^(7/3)=3^(2/3+7/3)=3^(9/3)=3^3=27
4^(2/3)*4^(1/3)=4^(2/3+1/3)=4^(3/3)=4^1=4
12^(2/3)=(3*4)^(2/3)=3^(2/3)*4^(2/3)
1/(4^(-1/3)=4^(1/3)
предварительно так номер 1!
1. 2ху/(у-х)(у+х) + х/у+х - у/у-х= 2ху+х(у-х)-у(у+х)/(у-х)(у+х)=2ху+ху-х^2 -у^2 -ху/(у-х)(у+х)=2ху-х^2 -у^2/(у-х)(у+х)=-(у^2-2ху+х^2)/(у-х)(у+х)=-(у-х)^2/(у-х)(у+х)=-(у-х)/(у+х)
2. (у-х)^2/х+у × -(у+х)/(у-х)=-(у-х)=х-у
8.4-(-0.6)=8.4+0.6=9