3x+x(4x)+36=

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Solution for 3x+x(4x)+36= equation:


Simplifying
3x + x(4x) + 36 = 0

Remove parenthesis around (4x)
3x + x * 4x + 36 = 0

Reorder the terms for easier multiplication:
3x + 4x * x + 36 = 0

Multiply x * x
3x + 4x2 + 36 = 0

Reorder the terms:
36 + 3x + 4x2 = 0

Solving
36 + 3x + 4x2 = 0

Solving for variable 'x'.

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

Divide each side by '4'.
9 + 0.75x + x2 = 0

Move the constant term to the right:

Add '-9' to each side of the equation.
9 + 0.75x + -9 + x2 = 0 + -9

Reorder the terms:
9 + -9 + 0.75x + x2 = 0 + -9

Combine like terms: 9 + -9 = 0
0 + 0.75x + x2 = 0 + -9
0.75x + x2 = 0 + -9

Combine like terms: 0 + -9 = -9
0.75x + x2 = -9

The x term is 0.75x.  Take half its coefficient (0.375).
Square it (0.140625) and add it to both sides.

Add '0.140625' to each side of the equation.
0.75x + 0.140625 + x2 = -9 + 0.140625

Reorder the terms:
0.140625 + 0.75x + x2 = -9 + 0.140625

Combine like terms: -9 + 0.140625 = -8.859375
0.140625 + 0.75x + x2 = -8.859375

Factor a perfect square on the left side:
(x + 0.375)(x + 0.375) = -8.859375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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