Question

между дробями умножение,решите

Answer 1

$\frac{ {c}^{2} + 4c + 4 }{2c - 6} \times \frac{ {c}^{2} - 9 }{5c + 10} = \frac{(c + 2) {}^{2} (c - 3)(c + 3)}{2(c - 3) \times 5(c + 2)} = \\ = \frac{(c + 2)(c + 3)}{10} = \frac{ {c}^{2} + 3c + 2c + 6 }{10} = \frac{ {c}^{2} + 5c + 6 }{10}$