Question

2x^2+8x=-1

Answer 1

factor?

Answer 2

yes, if difficult use quadratic formula

Answer 3

-2 plus or minus (sqrt 14 / 2)

Answer 4

not an answer on the sheet

Answer 5

(x+2)(2x-sqrt14)

Answer 6

-4 plus or minus sqrt 14 over 2
-4 plus or minus sqrt 2 over 2
-4 plus or minus sqrt 14 over 4
-8 plus or minus sqrt 14 over 2

Answer 7

ok after a long time of being brain dead (i forgot how to do this) i got your answer. It's -4 plus or minus sqrt 14 over 2

Answer 8

thank ya

Answer 9

Ok, so first let's plug it into the quadratic formula
-b plus or minus √b^2-4*a*c
---------------------------------
2*a
so we get -8 (+-) √8^2-4*2*1 / 2 * 2
let's use basic order of operations
-8 (+-)√56
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4
Now, remember to simplify your radical as best as you can.
-8(+-) 2√14
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4
but -8, 4 , and 2 all go into 2, so we can simplify all numbers by that (except the radical)
so we get
-4 (+-) √14
------------
2