Question

x2 + 5x + 22 = 0
I got :-2.5 am i right??

Answer 1

NO the answer is x=-4.4

Answer 2

yes U are right

Answer 3

-2.5 is right??

Answer 4

em sure it is right

Answer 5

it's all wrong.
\[D=b^{2}−4∗a∗c=25−4∗1∗22=−63\]

D<0
, so there will be complex roots (solutions), given by the formulas:

\[x_{1,2}=(−b±i∗\sqrt{-D})/(2∗a) = (-5 \pm i*\sqrt{63})/2\]
, or by common formula with no calculating of
\[\sqrt{-63}\]
, i.e.
\[x_{1,2}=(−b±\sqrt{-D})/(2∗a)=(−5±\sqrt{−63})/2\]