Question

помогите срочно доветси тотожнисть

Answer 1

Ответ:

$\frac{ {c}^{} + 2}{ {c}^{2} + 3 {c}^{} } - \frac{1}{3 {c}^{} + 9 } - \frac{2}{3 {c}^{} } = \frac{ {c}^{} + 2}{ {c}^{} ( {c}^{} + 3) } - \frac{1}{3( {c}^{} + 3) } - \frac{2}{3c} = \frac{3( {c}^{} + 2) - {c}^{} - 2( {c}^{} + 3) }{3 {c}^{} ( {c}^{} + 3)} = \frac{3 {c}^{} + 6 - {c}^{} - 2 {c}^{} - 6 }{3 {c}^{}( {c}^{} + 3) } = \frac{ {c}^{}(3 - 1 - 2) }{3 {c}^{}( {c}^{} + 3) } = 0$