3x^2+6x+9=-17

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Solution for 3x^2+6x+9=-17 equation:


Simplifying
3x2 + 6x + 9 = -17

Reorder the terms:
9 + 6x + 3x2 = -17

Solving
9 + 6x + 3x2 = -17

Solving for variable 'x'.

Reorder the terms:
9 + 17 + 6x + 3x2 = -17 + 17

Combine like terms: 9 + 17 = 26
26 + 6x + 3x2 = -17 + 17

Combine like terms: -17 + 17 = 0
26 + 6x + 3x2 = 0

Begin completing the square.  Divide all terms by
3 the coefficient of the squared term: 

Divide each side by '3'.
8.666666667 + 2x + x2 = 0

Move the constant term to the right:

Add '-8.666666667' to each side of the equation.
8.666666667 + 2x + -8.666666667 + x2 = 0 + -8.666666667

Reorder the terms:
8.666666667 + -8.666666667 + 2x + x2 = 0 + -8.666666667

Combine like terms: 8.666666667 + -8.666666667 = 0.000000000
0.000000000 + 2x + x2 = 0 + -8.666666667
2x + x2 = 0 + -8.666666667

Combine like terms: 0 + -8.666666667 = -8.666666667
2x + x2 = -8.666666667

The x term is 2x.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2x + 1 + x2 = -8.666666667 + 1

Reorder the terms:
1 + 2x + x2 = -8.666666667 + 1

Combine like terms: -8.666666667 + 1 = -7.666666667
1 + 2x + x2 = -7.666666667

Factor a perfect square on the left side:
(x + 1)(x + 1) = -7.666666667

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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