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

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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

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

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Other answers:

err C
ya it's -6/2 = -3 and sqrt(8) / 2 = sqrt(2)
so -3 plus minus sqrt 2
thank you
you were right, you just didn't apply the /2
Np.
how would i do −16t2 + 64t + 4?
would it be 2 plus or minus square root of 17 all over 2?
sorry just saw this
\[2 \pm \frac{ \sqrt{17} }{ 2 }\]
since it's 64/32 = 2 it becomes only sqrt(17)/2
thank you so much
Np

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