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

i always use the quadratic formula:
x = [-b +-(sqrt(b²-4*a*c))] / 2*a
a = 1 b = 6 c = 7
x = [-6 +-(sqrt(36 - 4 * 1 * 7)] / 2
x = [-6 +- sqrt(8)] / 2

x = [-6 + 2 * sqrt(2)] / 2

OR x1 = -3 + sqrt(2)

x2 = -3 -sqrt(2)

which means the answer is
negative 3 plus or minus square root of 2

How's that for an answer? LOL

Answer 2

lol thanks

Answer 3

u r welcome
:-)