Question

Помогите решить!!!!!!!!!!!!!!!!!

Answer 1

$frac{a {}^{2} - 16 }{ {2a}^{2} + 8a } = frac{(a - 4)(a + 4)}{2a(a + 4)} = frac{a - 4}{2a} \ \ a = - 0.2 \ \ frac{ - 0.2 - 4}{ - 0.2 times 2} = frac{ - 4.2}{ - 0.4} = 10.5$