Question

7(2+x)=4-2[-x+5-4x(x-1)]

Answer 1

13-raiz de 809/16
E
13+raiz de 809/16

Answer 2

Resposta:

$\frac{\sqrt{7} }{8}$

Explicação passo-a-passo:

14 + 7x = 4 -2[-x+5-4x²+4x]

14+7x= 4 -2[3x +5 -4x²]

14 + 7x = 4 - 2+ 3x +5 -4x²

7x-3x + 4x² = -14 +4 -2 +5

4x + 4x= raiz d 7

8x = raiz d 7

x= raiz de 7 \ 8