Question

√b2-4ac para a=2 b=6 e c=4

Answer 1

$\sqrt{6 ^{2} } -4*2*4$
$\sqrt{ 6^{2}}-4*2*4 \sqrt{36} = 6 6-4*2*4 6-32 = 26$

Answer 2

= $\sqrt{ b^{2}-4ac }$
= $\sqrt{ 6^{2}-4.(2).(4) }$
= $\sqrt{36-32}$
= $\sqrt{4}$
= 2