Question

Выполнить действие 15y^2-7y-(13y-5y^2).

Answer 1

15y² - 7y - (13y - 5y²) = 15y² - 7y - 13y + 5y² = 20y² - 20y

Answer 2

${15y}^{2} - 7y - 13y + {5y}^{2} = {20y}^{2} - 20y = 20y(y - 1)$