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

1) divide all by \(2\)
what do you get ?

Answer 2

i mean starting \[2x^2 + 8x = -26\]divide all by \(2\)

Answer 3

x1+x2=-b/a

Answer 4

x1.x2=c/a

Answer 5

ax²+bx+c

Answer 6

x^2 + 4x = -13 @satellite73

Answer 7

k good
only two more steps
what is half of \(4\) ?

Answer 8

2

Answer 9

x1+x2=-4 so only can be A or B

Answer 10

right
we go right from
\[x^2+4x=-13\] to
\[(x+2)^2=-13+2^2\] or
\[(x+2)^2=-9\]

Answer 11

9+4=13 so its A)

Answer 12

then
\[x+2=\pm\sqrt{-9}\\
x+2=\pm3i\\
x=-2\pm3i\]

Answer 13

so it would be A (: @satellite73 @RaphaelFilgueiras

Answer 14

yes

Answer 15

thank you both so so much

Answer 16

yw from us both

Answer 17

yw