## anonymous one year ago Solve x2 + 6x + 7 = 0. x = −1 and x = −5 3 plus or minus square root of 2 negative 3 plus or minus square root of 2 quantity of negative 3 plus or minus square root of 2 all over 2

1. Nnesha

apply the quadratic formula $\huge\rm x=\frac{ -b \pm \sqrt{b^2-4ac} }{ 2a }$ plugin a ,b ,c values $\huge\rm Ax^2+Bx+C$quadratic equation where a=leading coefficient b=middle term c=constant term

2. Nnesha

what is a in that equation a= ? b=? c=?

3. anonymous

1

4. Nnesha

yes right a =1 b= ? c=??

5. Nnesha

b =middle term c=constant

6. anonymous

6x

7. anonymous

7

8. Nnesha

just the coefficient so b=6 a=1,b=6, c=7 now substitute a , b ,c for their values into quadratic formula

9. anonymous

okay

10. anonymous

This method works just fine. However, in this problem, it would be easier to factor.

11. anonymous

would it be d?

12. Nnesha

it's not factorable.

13. Nnesha

and no what did you get 't the numerator ?

14. anonymous

-3 plus or minus the suare root of -22

15. Nnesha

hmm no how did you get -22 ???

16. anonymous

i had done 6- (4)(1)(7), but i realize 6 needs to be squared, so i now get -3 +- square root of 2?

17. anonymous

2

18. Nnesha

ugghhhhh nvm sorry latex arn't working

19. anonymous

what...?

20. Nnesha

yes that's right take square of 6

21. Nnesha

i was trying to type that into the equation tool but it's not loading