Question

упростите 2 выражение пожалуйста​

Answer 1

Объяснение:

$\frac{a {}^{2} - 3a }{x {}^{3} } \times \frac{a {}^{2} x {}^{12} }{5a - 15} = \frac{\left(a^{2}-3a\right)a^{2}x^{12}}{x^{3}\left(5a-15\right)} =\frac{a^{2}\left(a^{2}-3a\right)x^{9}}{5a-15} =\frac{a\left(a-3\right)a^{2}x^{9}}{5\left(a-3\right)} =\frac{aa^{2}x^{9}}{5} =\frac{a^{3}x^{9}}{5}$

$\frac{6a + 8b}{a {}^{8} x} \div \frac{15a + 20b}{a {}^{4}x {}^{6} } =\frac{\left(6a+8b\right)a^{4}x^{6}}{a^{8}x\left(15a+20b\right)} =\frac{\left(6a+8b\right)x^{5}}{\left(15a+20b\right)a^{4}} =\frac{2\left(3a+4b\right)x^{5}}{5\left(3a+4b\right)a^{4}} =\frac{2x^{5}}{5a^{4}}$