Question

What are the solutions of 2x2 + 8x = -26
A) -2 ± 3 i
B) -2 ± i
C) 2 ± 6 i
D) -3 ± 2 i

Answer 1

Write the equation as
\[
2 x^2 +8 x +26 =0
\]
and compute
\[
b^2-4ac
\]

Answer 2

You can simplify it by dividing by 2 to get
\[
x^2 + 4x +13=0
\]

Answer 3

so 8^2-4(2)(-46)?

Answer 4

@eliassaab

Answer 5

im so confused

Answer 6

Use the simplified version
\[
x^2 + 4x +13=0\\
a=1; b =4; c=13
\]

Answer 7

\[
b^2 - 4 a c = 4^2 - 4(1)13=16- 52=-36
\]

Answer 8

\[
\frac {- 4 \pm i \sqrt {36}}{2}= -2 \pm 3i
\]

Answer 9

Did you get it?

Answer 10

So it is A