Question

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

Answer 1

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

Answer 2

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

Answer 3

1

Answer 4

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

Answer 5

b =middle term
c=constant

Answer 6

6x

Answer 7

7

Answer 8

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

Answer 9

okay

Answer 10

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

Answer 11

would it be d?

Answer 12

it's not factorable.

Answer 13

and no what did you get 't the numerator ?

Answer 14

-3 plus or minus the suare root of -22

Answer 15

hmm no how did you get -22 ???

Answer 16

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

Answer 17

2

Answer 18

ugghhhhh nvm sorry latex arn't working

Answer 19

what...?

Answer 20

yes that's right take square of 6

Answer 21

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