Question

determine o valor de x ​

Answer 1

Explicação passo-a-passo:

$\sf x^2=(x-4)\cdot(x-4+16)$

$\sf x^2=(x-4)\cdot(x+12)$

$\sf x^2=x^2+12x-4x-48$

$\sf x^2-x^2+48=12x-4x$

$\sf 48=8x$

$\sf x=\dfrac{48}{8}$

$\sf x=6$