4x^2=-3x-12

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Solution for 4x^2=-3x-12 equation:


Simplifying
4x2 = -3x + -12

Reorder the terms:
4x2 = -12 + -3x

Solving
4x2 = -12 + -3x

Solving for variable 'x'.

Reorder the terms:
12 + 3x + 4x2 = -12 + -3x + 12 + 3x

Reorder the terms:
12 + 3x + 4x2 = -12 + 12 + -3x + 3x

Combine like terms: -12 + 12 = 0
12 + 3x + 4x2 = 0 + -3x + 3x
12 + 3x + 4x2 = -3x + 3x

Combine like terms: -3x + 3x = 0
12 + 3x + 4x2 = 0

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

Divide each side by '4'.
3 + 0.75x + x2 = 0

Move the constant term to the right:

Add '-3' to each side of the equation.
3 + 0.75x + -3 + x2 = 0 + -3

Reorder the terms:
3 + -3 + 0.75x + x2 = 0 + -3

Combine like terms: 3 + -3 = 0
0 + 0.75x + x2 = 0 + -3
0.75x + x2 = 0 + -3

Combine like terms: 0 + -3 = -3
0.75x + x2 = -3

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 = -3 + 0.140625

Reorder the terms:
0.140625 + 0.75x + x2 = -3 + 0.140625

Combine like terms: -3 + 0.140625 = -2.859375
0.140625 + 0.75x + x2 = -2.859375

Factor a perfect square on the left side:
(x + 0.375)(x + 0.375) = -2.859375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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