3x(x+1)+5=0

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Solution for 3x(x+1)+5=0 equation:


Simplifying
3x(x + 1) + 5 = 0

Reorder the terms:
3x(1 + x) + 5 = 0
(1 * 3x + x * 3x) + 5 = 0
(3x + 3x2) + 5 = 0

Reorder the terms:
5 + 3x + 3x2 = 0

Solving
5 + 3x + 3x2 = 0

Solving for variable 'x'.

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

Divide each side by '3'.
1.666666667 + x + x2 = 0

Move the constant term to the right:

Add '-1.666666667' to each side of the equation.
1.666666667 + x + -1.666666667 + x2 = 0 + -1.666666667

Reorder the terms:
1.666666667 + -1.666666667 + x + x2 = 0 + -1.666666667

Combine like terms: 1.666666667 + -1.666666667 = 0.000000000
0.000000000 + x + x2 = 0 + -1.666666667
x + x2 = 0 + -1.666666667

Combine like terms: 0 + -1.666666667 = -1.666666667
x + x2 = -1.666666667

The x term is x.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
 + 0.25 + x2 = -1.666666667 + 0.25

Combine like terms:  + 0.25 = 1.25
1.25 + x2 = -1.666666667 + 0.25

Combine like terms: -1.666666667 + 0.25 = -1.416666667
1.25 + x2 = -1.416666667

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = -1.416666667

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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