Question

Resolva as equações a seguir.
a) 25x2= 16, sendo U = R.

Answer 1

Oie, Td Bom?!

$25x {}^{2} = 16$

$25x {}^{2} - 16 = 0$

$x {}^{2} = \frac{16}{25}$

$x = ± \sqrt{ \frac{16}{25} }$

$x = ± \frac{4}{5}$

$S = \left \{ - \frac{4}{5} \: , \: \frac{4}{5} \right \}$

Att. Makaveli1996