Question

Which of the following is a solution of x2 + 2x + 4?

a) -2 + 2i squareroot 3

b) 2 +2i squareroot 3

c) 1 - I squareroot 3

d) -1 + I squareroot 3

Answer 1

you need to use quadratic formula \[\huge\rm x =\frac{ -b \pm \sqrt{b^2 -4ac} }{ 2a }\]
a ,b,and c values are \[\large\rm Ax^2+Bx+C=0\]
a=leading coefficient
b= middle term
c= constant term

Answer 2

\[x=\frac{ -2x \pm -12 }{ 8}\]

Answer 3

middle term is b which is 2 we don't the x variable
and what is a= ?

Answer 4

remember c is constant term
and a is leading coefficient
\[\huge\rm \color{reD}{A}x^2+\color{blue}{B}x+\color{salmon}{C}=0\]
\[\huge\rm \color{ReD}{1}x^2+\color{blue}{2}x+\color{salmon}{4}=0\]