Question

Помогите. Пожалуйста!

Answer 1

$(z - frac{5z}{z + 3} ) div frac{z - 2}{z + 3} = \ frac{ {z}^{2} + 3z - 5z }{z + 3} times frac{z + 3}{z - 2} = \ = frac{z(z- 2)}{z + 3} times frac{z + 3}{z - 2} = z$

Answer 2

Thank you very much!!!