Question

Решите с полным раскрытием по формуле BlessRNG

Answer 1

$\frac{8a}{9c} - \frac{64a {}^{2} + 81c {}^{2} }{72ac} + \frac{9c - 64a}{8a} = \frac{8a \times 8a - (64a {}^{2} + 81c {}^{2}) + 9c(9c - 64a)}{72ac} = \\ = \frac{64 {a}^{2} - 64 {a {}^{2} - 81c {}^{2} } + 81 {c }^{2} - 576ac}{72ac} = \frac{576ac}{72ac} = 8$