## anonymous one year ago Solve x2 + 4x − 4 = 0. x equals the quantity of negative 2 plus or minus square root 16 all over 2 x equals negative 4 plus or minus square root 2 x equals negative 2 plus or minus 2 square root 2 x equals the quantity of 4 plus or minus square root 18 all over 2

1. anonymous

okay so you have to isolate x do you know how to do that?

2. anonymous

not really

3. anonymous

@scenemunster its C

4. anonymous

Use the quadratic formula.$\huge~\rm~x=\frac{ -b \pm \sqrt{b^2-4ac} }{ 2a }$

5. anonymous

yep ^^

6. anonymous

im stuck at $-4 \pm \sqrt{\frac{ 32 }{ 2 }}$

7. anonymous

ôkay welll to start of you have to divide the entire -4+/-srt(32) by 2 not just the 32 in the square root after that you simply simplify

8. anonymous

i got c

9. anonymous

Which of the following is a solution of x2 + 2x + 8? 4 + i times the square root of 7 −1 + i times the square root of 7 1 + i times the square root of 7 −4 + i times the square root of 7

10. anonymous

im stuck on this one i got to $-2\pm \sqrt{\frac{ 36 }{ 2 }}$

11. anonymous

You add 32 and 4. :D Continue. |dw:1438728318711:dw|

12. anonymous

and then that came out to what i put. that's the part that im stuck on CX

13. anonymous

4-32 is not 36...

14. anonymous

oh its -28