12. Упростите выражение
[tex] \frac{8 - a {}^{3} }{16 - a {}^{2} } \times \frac{a + 4}{a {}^{2 } + 2a + 4} [/tex]
и найдите его значение при а= -2
А) 0
B)
[tex] \frac{2}{3} [/tex]
C) 1
D)-1​
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