Question

Solve x2 + 6x + 7 = 0.
a) x = −1 and x = −5
b) 3 plus or minus square root of 2
c)-3 plus or minus square root of 2
d)-3 plus or minus square root of 2 all over 2

Answer 1

is that x^2 ?

Answer 2

yes

Answer 3

use the quadratic formula \[\frac{ -b \pm \sqrt{b ^{2}-4ac} }{ 2a }\]
A= 1 B = 6 C= 7

Answer 4

err C

Answer 5

ya
it's -6/2 = -3 and sqrt(8) / 2 = sqrt(2)

Answer 6

so -3 plus minus sqrt 2

Answer 7

thank you

Answer 8

you were right, you just didn't apply the /2

Answer 9

Np.

Answer 10

how would i do −16t2 + 64t + 4?

Answer 11

would it be 2 plus or minus square root of 17 all over 2?

Answer 12

sorry just saw this

Answer 13

\[2 \pm \frac{ \sqrt{17} }{ 2 }\]

Answer 14

since it's 64/32 = 2 it becomes only sqrt(17)/2

Answer 15

thank you so much

Answer 16

Np