Question

AYUDA PORFAS 20 PUNTOS SE DEVE CALCULAR X

Answer 1

Respuesta:

$18x + (x - 4)(x + 4) = {x}^{2} + 20$

$18x + {x}^{2} - 16 = {x}^{2} + 20$

$18x - 16 = 20$

$18x = 20 + 16$

$18x = 36$

$x = 2$