x^2+3x^2+8=-3x

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Solution for x^2+3x^2+8=-3x equation:


Simplifying
x2 + 3x2 + 8 = -3x

Reorder the terms:
8 + x2 + 3x2 = -3x

Combine like terms: x2 + 3x2 = 4x2
8 + 4x2 = -3x

Solving
8 + 4x2 = -3x

Solving for variable 'x'.

Reorder the terms:
8 + 3x + 4x2 = -3x + 3x

Combine like terms: -3x + 3x = 0
8 + 3x + 4x2 = 0

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

Divide each side by '4'.
2 + 0.75x + x2 = 0

Move the constant term to the right:

Add '-2' to each side of the equation.
2 + 0.75x + -2 + x2 = 0 + -2

Reorder the terms:
2 + -2 + 0.75x + x2 = 0 + -2

Combine like terms: 2 + -2 = 0
0 + 0.75x + x2 = 0 + -2
0.75x + x2 = 0 + -2

Combine like terms: 0 + -2 = -2
0.75x + x2 = -2

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 = -2 + 0.140625

Reorder the terms:
0.140625 + 0.75x + x2 = -2 + 0.140625

Combine like terms: -2 + 0.140625 = -1.859375
0.140625 + 0.75x + x2 = -1.859375

Factor a perfect square on the left side:
(x + 0.375)(x + 0.375) = -1.859375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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