Question

Вариант Б1 ! Помогите

Answer 1

$a) frac{2x+17-10-x}{49-x^2} = frac{x+7}{(x+7)(7-x)} = frac{1}{7-x} \ b) frac{y^2-8y+9+2y}{y-3}= frac{y^2-6y+9}{y-3} = frac{(y-3)^2}{y-3} =y-3$