## bhruifafn 3 years ago 2x^2+8x=-1

1. marktierra

factor?

2. bhruifafn

yes, if difficult use quadratic formula

3. marktierra

-2 plus or minus (sqrt 14 / 2)

4. bhruifafn

not an answer on the sheet

5. marktierra

(x+2)(2x-sqrt14)

6. bhruifafn

-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

7. neverforgetvivistee

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

8. bhruifafn

thank ya

9. neverforgetvivistee

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 ----------- 4 Now, remember to simplify your radical as best as you can. -8(+-) 2√14 ------------- 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