Question

раскройте скобки (х/3-0,5у)^2

Answer 1

х^2/9 - х*у/3 + 0,25*у^2

Answer 2

$(a-b)^2=a^2-2ab+b^2\\\\(\frac{x}{3}-0,5y)^2=(\frac{x}{3})^2-2\cdot \frac{x}{3}\cdot 0,5y+(0,5y)^2=\\\\=\frac{x^2}{9}-\frac{xy}{3}+\frac{y^2}{4}$