Question

Помогите решить! (Задача на украинском языке)

Answer 1

Объяснение:

1)

$(a + 2)(a - 2)( {a}^{2} + 4) - {( {a}^{2} + 8) }^{2} = ( {a}^{2} - 4)( {a}^{2} + 4) - ( {a}^{4} + 16 {a}^{2} + 64) = {a}^{4} - 16 - {a}^{4} - 16 {a}^{2} - 64 = - 16a - 80 = - 16(a + 5)$

$a = \frac{1}{2 } \\ - 16( \frac{1}{2} + 5) = - 16 \times \frac{11}{2} = - 8 \times 11 = - 88$

2)

$(x - 3)( x+ 3)( {x}^{2} + 9) - ( {x}^{2} + 6) {}^{2} = ( {x}^{2} - 9)( {x}^{2} + 9) - ( {x}^{4} + 12 {x}^{2} + 36) = {x}^{4} - 81 - {x}^{4} - 12x - 36 = - 12x - 117 = - 3(4x + 39)$

$x = \frac{1}{2}$

$- 3(4 \times \frac{1}{2} + 39) = - 3(2 + 39) = - 3 \times 41 = - 123$