Question

Resolva essa equação : (x + 4) (x+4)=9

Answer 1

Oie, Td Bom?!

$(x + 4) \: . \: (x + 4) = 9$

$(x + 4) {}^{2} = 9$

$x + 4 = ± \sqrt{9}$

$x + 4 = ±3$

• $x + 4 = - 3$

$x = - 3 - 4$

$x = - 7$

• $x + 4 = 3$

$x = 3 - 4$

$x = - 1$

$S = \left \{ -7 \: , \: - 1\right \}$

Att. Makaveli1996