Question

я класс!!!! срочно помогите!!!​

Answer 1

$(-0,5abc)^2=(-0,5)^2*a^2b^2c^2=0,5^2*a^2b^2c^2=(\frac{1}{2})^2*a^2b^2c^2=\frac{1}{4}a^2b^2c^2=\\ \\ 0,25a^2b^2c^2$