5у - у2 = 1- у2 + 4у +4;
5у - у2 - 1 + у2 - 4у - 4 = 0;
у - 5 = 0;
у =5
А) 9y: 15y^2x^2 -10x: 15x^2y^2=9y^2-10x:15x^2y^2. б)4:(y-2)(y+2) -1 :(y-2)= 4:(y-2)(y+2) -(y+2):(y+2)(y-2)=4-y-2:(y-2)(y+2) в) -2(a+b):(a+b)^2+3a+3b:(a+b)^2=-2a-2b: (a+b)^2+3a+3b : (a+b)^2=a+b:(a+b)^2=1:a+b г)(18-10):15a-30=8:15a-30 д)1:x(x-y)-1:x(1-y^2)=1-y^2-x-y:x(x-y)(1-y)(1+y)=loading... я не знаю
<span>-20sin1°/ sin359°=-</span>20sin(360-359)/ sin359°=-20sin<span><span>359°</span>/ sin359°</span>=-20