7x^2+x=12x^2-3x+2

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Solution for 7x^2+x=12x^2-3x+2 equation:


Simplifying
7x2 + x = 12x2 + -3x + 2

Reorder the terms:
x + 7x2 = 12x2 + -3x + 2

Reorder the terms:
x + 7x2 = 2 + -3x + 12x2

Solving
x + 7x2 = 2 + -3x + 12x2

Solving for variable 'x'.

Reorder the terms:
-2 + x + 3x + 7x2 + -12x2 = 2 + -3x + 12x2 + -2 + 3x + -12x2

Combine like terms: x + 3x = 4x
-2 + 4x + 7x2 + -12x2 = 2 + -3x + 12x2 + -2 + 3x + -12x2

Combine like terms: 7x2 + -12x2 = -5x2
-2 + 4x + -5x2 = 2 + -3x + 12x2 + -2 + 3x + -12x2

Reorder the terms:
-2 + 4x + -5x2 = 2 + -2 + -3x + 3x + 12x2 + -12x2

Combine like terms: 2 + -2 = 0
-2 + 4x + -5x2 = 0 + -3x + 3x + 12x2 + -12x2
-2 + 4x + -5x2 = -3x + 3x + 12x2 + -12x2

Combine like terms: -3x + 3x = 0
-2 + 4x + -5x2 = 0 + 12x2 + -12x2
-2 + 4x + -5x2 = 12x2 + -12x2

Combine like terms: 12x2 + -12x2 = 0
-2 + 4x + -5x2 = 0

Begin completing the square.  Divide all terms by
-5 the coefficient of the squared term: 

Divide each side by '-5'.
0.4 + -0.8x + x2 = 0

Move the constant term to the right:

Add '-0.4' to each side of the equation.
0.4 + -0.8x + -0.4 + x2 = 0 + -0.4

Reorder the terms:
0.4 + -0.4 + -0.8x + x2 = 0 + -0.4

Combine like terms: 0.4 + -0.4 = 0.0
0.0 + -0.8x + x2 = 0 + -0.4
-0.8x + x2 = 0 + -0.4

Combine like terms: 0 + -0.4 = -0.4
-0.8x + x2 = -0.4

The x term is -0.8x.  Take half its coefficient (-0.4).
Square it (0.16) and add it to both sides.

Add '0.16' to each side of the equation.
-0.8x + 0.16 + x2 = -0.4 + 0.16

Reorder the terms:
0.16 + -0.8x + x2 = -0.4 + 0.16

Combine like terms: -0.4 + 0.16 = -0.24
0.16 + -0.8x + x2 = -0.24

Factor a perfect square on the left side:
(x + -0.4)(x + -0.4) = -0.24

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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