Question

решите уравнение с "или" 3z^2-75=0
5z^3-5z=0
z-9z^3=0

Answer 1

1)3(z-5)(z+5)=0;
z=5;z=-5;
5z(z-1)(z+1)=0;
z=0;z=1;z=-1;
3)z(1-3z)(1+3z)=0;
z=0;z=1/3;z=-1/3