Question

( 2x + 2)2 – 16 = 0
Quanto é? Pfvor me ajudem eu tô precisando muito terminar essa.

Answer 1

Oie, Td Bom?!

$(2x + 2) {}^{2} - 16 = 0$

$(2x + 2) {}^{2} - 4 {}^{2} = 0$

$(2x + 2 - 4) \: . \: (2x + 2 + 4) = 0$

$(2x - 2) \: . \: (2 x + 6) = 0$

$2(x - 1) \: . \: 2(x + 3) = 0$

$(x - 1) \: . \: (x + 3) = 0$

• $x - 1 = 0⇒x = 1$

• $x + 3 = 0⇒x = - 3$

$S = \left \{ - 3 \: ,\: 1\right \}$

Att. Makaveli1996