x^2+3x+7+9=0

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Solution for x^2+3x+7+9=0 equation:


Simplifying
x2 + 3x + 7 + 9 = 0

Reorder the terms:
7 + 9 + 3x + x2 = 0

Combine like terms: 7 + 9 = 16
16 + 3x + x2 = 0

Solving
16 + 3x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-16' to each side of the equation.
16 + 3x + -16 + x2 = 0 + -16

Reorder the terms:
16 + -16 + 3x + x2 = 0 + -16

Combine like terms: 16 + -16 = 0
0 + 3x + x2 = 0 + -16
3x + x2 = 0 + -16

Combine like terms: 0 + -16 = -16
3x + x2 = -16

The x term is 3x.  Take half its coefficient (1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
3x + 2.25 + x2 = -16 + 2.25

Reorder the terms:
2.25 + 3x + x2 = -16 + 2.25

Combine like terms: -16 + 2.25 = -13.75
2.25 + 3x + x2 = -13.75

Factor a perfect square on the left side:
(x + 1.5)(x + 1.5) = -13.75

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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