Question

X=-b+/- √ sobre 2.a

= b2-4.a.c

Sendo : a= 4 b=8 c=2

Answer 1

Δ = b^2 - 4ac ==> 8^2 - 4x4x2 ==> 64 - 16x2 ==> 64 - 32 ==> 32 ==> x = - b +/- √Δ /2a ==> - 8 +/- √32 / 2 x 4 ==> - 8 +/- √32/8  ==> x' = - 8 + √32/8 ==> x'' = - 8 - √32/8 ==> S = {-8 - √32/8 , - 8 + √32/8}